Last updated: 05/03/20
May 2020
- e2019GL086236 First Published:09 April 2020
- We detect 854 shallow earthquakes and analyze the focal mechanisms of 40 events based on the data set from a new seismic array in Myanmar
- We identify two fault zones in the Central Basin that may accommodate surplus strike‐slip deformations not taken up by the Sagaing Fault
- We observe a lower‐crustal seismic zone west of the Kabaw Fault, which is controlled by eastward subduction of the Indian Plate
- e2020GL086945 First Published:09 April 2020
- For the Nicoya earthquake the poroelastic deformation can account for most of the postseismic deformation within 7 days at some stations
- For this earthquake, postseismic geodetic signals can be either amplified or muted by the poroelastic response, depending on location
- The poroelastic response to the Nicoya earthquake may induce error up to 40% in elastic‐only afterslip estimates
- e2019GL086469 First Published:09 April 2020
- The first full‐wave Pn model of the eastern Tibetan Plateau reveals early‐stage lithospheric foundering
- The model shows a very depleted and cold underthrusted Lhasa lithosphere under the eastern Qiangtang Terrane
- The west‐east contrast of magmatism in northern Tibet reflects different stages of lithospheric removal
- e2020GL087161 First Published:09 April 2020
- A new GNSS receiver architecture is developed by embedding both accelerometer and gyroscope to capture fierce seismic displacements
- GNSS displacement error and phase lag are both reduced by 70% and 85% to 2 mm and 8.0 ms, respectively, compared to conventional receivers
- Six‐degree‐of‐freedom seismogeodesy is achieved with the displacement error and phase lag reduced further to 0.9 mm and 3.5 ms, respectively
- e2019GL085377 First Published:09 April 2020
- We propose an approach to quantify the ratio between elastic and inelastic deformation in subduction forearcs
- Two distinct correlations can be observed between interseismic and Quaternary uplift rates
- We propose that 4% to 8% of interseismic uplift rates translate into persistent deformation in northern Chile
- e2020GL087452 First Published:17 April 2020
- Airborne UAVSAR interferometry elucidates local variations in magnitude and orientation of displacements at the Slumgullion landslide
- High‐resolution LiDAR DEM reveals the landslide thickness at the emergent toe
- InSAR‐measured landslide speed helps constrain the material viscosity (109–1011.5 Pa·s at the Slumgullion) based on Bingham plastic model
- e2019GL086020 First Published:12 March 2020
- Dynamic stress changes from the first Ridgecrest earthquake were insufficient to immediately trigger the second earthquake
- Although the first earthquake did not create the conditions necessary for the second to occur, it affected the slip distribution and timing
- Stress changes from the Ridgecrest ruptures explain the location of creep on the Garlock Fault and may have brought it closer to failure
Feb 2020
- e2019GL086302 First Published:03 March 2020
- Collisions of structures within fault zones cause high‐frequency earthquake ground motion.
- The physics of elastic impact predicts that collisions depend on different physical parameters as compared with frictional fault slip.
- Accounting for elastic impact ground motion explains stress drop and radiation pattern observations.
- e2019GL085705 First Published:29 February 2020
Orthogonal fault rupture and rapid postseismic deformation following 2019 Ridgecrest, California earthquake sequence revealed from geodetic observations
- e2019GL086888 First Published:29 February 2020
- 3D surface displacements of the 2019 Ridgecrest earthquakes are derived from Sentinel‐1 and ALOS‐2 InSAR
- Multiple asperities are revealed through geodetic modelling of the 3D surface displacements
- Orthogonal fault ruptures of the Mw6.4 event are revealed by using GPS horizonal measurements
- The rapid decay of aftershocks is explained by the afterslip following the mainshocks
- e2019GL085882 First Published:26 February 2020
- First Published: 20 February 2020
- First recording of dynamic rotational and translational motion over a very broad frequency range in close distance to a volcano‐related earthquake
- Complete reconstruction of ground motion history using six component recordings
- Rotational motion recordings reveal a large influence of local site conditions and/or detailed source effects which are not perceptible in traditional translational recordings
- e2019GL085870 First Published:23 January 2020
- First Published: 11 February 2020
- Seismic P and S phases are obtained with a recent machine‐learning phase picker—PhaseNet
- We build a high‐precision earthquake catalog for the July 2019 Ridgecrest, California, earthquake sequence from raw seismic data
- Our high‐precision earthquake catalog reveals detailed seismicity evolution and seismic fault structures
- First Published: 11 February 2020
- We present the first quantitative view of how landslide activity may change within High Mountain Asia resulting from changes in extreme precipitation
- We find that the rate of increase in landslide activity at the end of the century is expected to be greatest over areas covered by current glaciers and glacial lakes
- We show how Global Climate Models and satellite observations can be used to model landslide impacts at time scales affected by climate change
Nov 2019
- First Published:15 November 2019
- Shear wave velocities in the upper 300m at the San Jacinto Fault, Clark segment
- The damage zone is asymmetric, with more damage to the northeast of the fault trace
- The damage zone geometry agrees with fault zone trapped waves generated by local earthquakes
- First Published: 13 November 2019
- Observed recurrence‐moment scaling is modeled under low asperity densities, and moment‐independent recurrence at high densities
- Variability in recurrence time of repeating earthquakes increases with asperity density in the low density regime
- Creep mediated stress transfers play an important role in the variability of recurrence time
A Dynamic Rupture Source Model for Very Low‐Frequency Earthquake Signal Without Detectable Nonvolcanic Tremors
- First Published: 13 November 2019
- Our dynamic rupture model reproduces very low‐frequency earthquake signal without associated nonvolcanic tremors
- A single asperity on fault with sudden stress drop followed by a rate strengthening effect can increase moment rate function duration
- Our results explain why in some cases we observe very low‐frequency earthquake accompanied with tremors, while in some cases, we do not
- First Published:11 November 2019
- Temporal evolution of precursory slip, foreshocks and fault coupling during laboratory earthquake nucleation depend on fluid pressure and slip history.
- The observed precursory moment release during nucleation scales with the mainshock moment release independent of fault conditions.
- A scaling relationship quantitatively predicts the experimental data. An extrapolation is proposed for natural earthquakes.
Oct 2019
First published: 29 October 2019
The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands
First published: 29 October 2019 UC-eLinks
First published: 29 October 2019
Dynamically Triggered Changes of Plate Interface Coupling in Southern Cascadia
- First Published:23 October 2019
- GNSS time series near the Mendocino Triple Junction show correlated changes in eastward velocity around the times of nearby M>6.5 earthquakes.
- Velocity changes are several mm/yr and are centered updip of the tremor zone.
- The observations suggest dynamically triggered coupling changes on the Cascadia subduction interface at about 25 km depth.
- First Published: 17 October 2019
- 2D elastic model predicts deformation due to collapse on caldera faults that bottom in a magma chamber
- For vertical faults deformation external to caldera is solely due to collapse‐induced pressurization of chamber
- Outward dipping faults predict horizontal displacements opposite in sign to observations
- First Published:16 October 2019
- Matched filter technique revealed details of activity patterns of shallow very low frequency earthquakes (SVLFEs) along the Nankai Trough
- The characteristics of SVLFE clusters and migrations reflect frictional properties and possible slow slip events on the plate boundary
- SVLFEs tended to cluster or migrate in the regions surrounding the shear stress accumulation peaks on the Philippine Sea Plate boundary
- First Published:15 October 2019
- First Published:16 October 2019
- Interseismic GNSS velocities in southern Kurile suggest low rigidity and/or thin lithosphere in the arc and, to a lesser degree, backarc.
- Interseismic data cannot resolve trade‐off between rigidity and thickness, but coseismic data provide additional constraints on rigidity.
- Addressing the effect of compliant arc‐back area will greatly improve the estimate of megathrust locking state.
July 2019
- First Published:22 June 2019
- Decreasing grain size with increasing strain creates favourable conditions for grainsize sensitive creep in mid‐crustal shear zones
- With increasing strain, interconnected phyllosilicate networks can break downand be supplanted by weaker fine‐grained polyphase mixtures
- Grain size sensitive creep in fine‐grained polyphase mixtures may govern the rheologyof the mid‐lower continental crust
- First Published:01 July 2019
- We investigate the role of periodic pore fluid pressure on AEs triggering during creep deformation experiments.
- AEs correlation with pore pressure oscillations increases as the rock approaches failure.
- AEs occur significantly more when pore pressure is lowest i.e. when deformation is maximum.
- First Published:03 July 2019
- We statistically assess the commonality of quasi‐periodic earthquake recurrence in 31 previously published large‐earthquake chronologies
- Most of the chronologies support an interpretation of quasi‐periodic recurrence (probability of random recurrence < 10%)
- Results suggest that stress renewal is a first‐order control on fault rupture across a wide range of tectonic settings
- Version of Record online:05 July 2019
- Proposed precursory changes of the 2011 Tohoku earthquake are not unique, either in time or in space
- The anomalous changes are in all likelihood not attributable to a preseismic slab deformation episode
- The anomalous changes likely reflect spatiotemporally correlated GRACE errors and signals of other processes
- Version of Record online:08 July 2019
- Earthquake source time functions are composed of subevents
- The number of subevents grows with the total earthquake moment, and subevent moments scale with main event moments
- Source time function complexity can be explained by self‐affine prestress heterogeneity
- First Published:28 May 2019
- We investigated the size distribution of shallow tremor events observed along the Nankai trough
- The observed size distribution is well explained by a power law with b value about 1 with an exponential taper for the largest events
- This result implies that tectonic tremor follows a tapered Gutenberg‐Richter distribution
- First Published:13 May 2019
- We investigate the ground displacements and the 3D source geometry of the December 2018 Mount Etna (Italy) volcano‐tectonic crisis
- DInSAR data obtained from SAR data pairs collected by Sentinel‐1 have been inverted through analytical modeling
- Our results suggest the presence of two volcanic sources: a shallow dike and a deeper one associated with a long‐term seismic swarm
April 2019
- First Published:29 April 2019
- A new plate reconstruction of East Asia fully depicts the NE migration of a trench‐trench‐trench triple junction since 30 Ma.
- This triple‐junction migration led to the overlapping, tearing, and detachment of subducted slabs in East Asia.
- The large horizontal slab above the 660‐km discontinuity was induced by a combination of trench retreat, large‐scale mantle flow, and viscosity jumps.
- First Published:29 April 2019
- Slip on megathrust faults under deep water near the trench generates persistent P wave coda reverberations isolated at distances >80°
- Average rmsPcoda/rmsP amplitude ratios are compared for 39 MW ≥ 7.5 megathrust ruptures that have estimates of their slip distribution
- Observation of high Pcoda/P ratios strongly correlates with coseismic rupture having shallow slip and likely enhanced tsunami excitation
- First Published:03 April 2019
- We calculate the shortening and strike‐slip components of two individual structures within the Qaidam Basin on the northern Tibetan Plateau.
- The target structures have undergone a complex deformation process comprising clockwise rotation (~7‐10 degree) and oblique convergence.
- Distributed dextral shear across the Qaidam Basin has dominated the formation of structures within the basin since the early Miocene.
- First Published:28 March 2019
- We use ambient seismic noise interferometry to measure changes in seismic velocity at Kīlauea during to the initiation of the 2018 eruption.
- We detect a rapid seismic velocity decrease 10 days before the eruption.
- This decrease is likely a result of damage accumulation in the edifice due to increased pressure.
- First Published:21 March 2019
- Finite element analysis is used to investigate the effect of sharp topography on deformation
- Tilt magnitude and azimuth are drastically affected by the presence of a cliff
- Anomalous tilt at Kīlauea can be partially explained by the caldera topography
January 2019
- First Published:22 January 2019
- First direct evidence of creep in the submarine part of the North Anatolian Fault based on a seafloor geodetic survey
- Estimated creep rate for the western part of the Sea of Marmara amounts to nearly half of the regional block motion
- A fault model incorporating the observed creep rate and the coupling condition estimated from microseismicity well explains GNSS data
- Pages: 13,269-13,276 First Published:12 November 2018
- Machine learning can model important characteristics of laboratory fault physics by training on finely resolved catalogs of slip events
- Fault physics becomes significantly harder to learn if catalogs are truncated at or above a critical magnitude of completeness
- Pages: 13,249-13,257 First Published:03 December 2018
- At least three faults were involved in the 2018 Mw 6.4 Hualien earthquake
- Most of the slip occurred on the main west‐dipping fault close to the north Coastal Range
- Rapid postseismic transient along the Milun fault in the Hualien City, whereas insignificant displacement close to the Coastal Range
- Pages: 12,274-12,282 First Published:05 November 2018
- Spatial heat heterogeneities are imaged on a frictional interface using carbon properties and Raman spectroscopy
- Rupture processes become more efficient with increasing slip on fault
- Heating efficiency depends on time‐dependent memory effect of the fault surface
Abstract Full text PDF References
- Pages: 12,253-12,262 First Published:14 November 2018
- Phases of recharge/discharge of karst aquifers modulate strain and seismicity in the Southern Apennines (Italy)
- We invert GPS time series to model hydrological stress perturbations by karst aquifers
- The 1980 Irpinia, MS 6.9, earthquake occurred during favorable hydrological stress conditions
- Pages: 12,837-12,846 First Published:05 December 2018
- Effective stress principle only applies if fluid pressure is homogeneous
- High injection rate and high stresses enhance in‐plane fluid pressure heterogeneity
- At high injection rate, high localized fluid overpressure is required for fault reactivation
- Pages: 12,814-12,820 First Published:06 November 2018
- We analyzed the current stress state of the Nojima Fault, the source of the 1995 Kobe (Japan) earthquake by borehole breakout data
- Current maximum horizontal stress at shallower depths (hanging wall) is oriented in NW–SE, subperpendicular to the fault
- Current maximum horizontal stress at depths of >650 m is oriented to the regional stress, showing healing of the fault in postearthquake
Abstract Full text PDF References
- Pages: 12,804-12,813 First Published:31 October 2018
- Seismic images reveal Hikurangi margin accretionary wedge architecture and seismic velocity distribution
- Magnetic anomaly modeling shows seismic tremor focused on the landward flanks and downdip of subducting seamounts
- Structural heterogeneity of the plate interface may influence the distribution of slow slip and tremor
September 2018
- First Published:04 September 2018
- Teleseismic, strong‐motion, and GPS displacement data are inverted to determine the spatio‐temporal earthquake slip distribution.
- Peak slip is ~3.0 m, average risetime is 4.7 s, rupture speed is 0.7 to 1.6 km/s, and duration is 30 s, indicating low fault strength.
- The earthquake likely ruptured the offshore shallow‐dipping décollement between the island volcanics and the former Pacific seafloor.
June 2018
- Pages: 6853-6861 First Published:08 June 2018
- We propose that a basement fault at a depth of 15 km in the northwest Zagros folded belt zone is responsible for the strongest earthquake instrumentally recorded in the Iran‐Iraq border region, the 2017 Mw7.3 Sarpol Zahab earthquake
- Two asperities with a maximum slip of 6 m in the 2017 Mw7.3 Sarpol Zahab earthquake were revealed with InSAR observations
- Frictional properties of the earthquake fault vary in the rupture area
- Pages: 6459-6465 First Published:21 June 2018
- Groundwater levels in the San Gabriel Valley Basin, California, reach all‐time low after 2011‐2016 drought
- Seismic velocities respond linearly with drawdown and recharge of ground water aquifer
- Change in seismic velocity change used to estimate change in groundwater storage
- Pages: 6450-6458 First Published:26 June 2018
- We conducted CMT inversions of shallow very low frequency earthquakes using a 3‐D velocity structure model and onshore seismic network
- A suitable 3‐D velocity structure model enables us to obtain accurate CMT solutions of events before seafloor observations
- Our CMT solutions suggest seismic slip around the very shallow part of the plate boundary beneath the accretionary prism toe
May 2018
- Pages: 5371-5379 First Published:29 May 2018
- Crack‐seal veins in subduction mélange record repeated low‐angle thrust faulting under tensile overpressure
- The minimum time interval between thrusting events is comparable to recurrence intervals of slow earthquakes
- Crack‐seal veins and viscous shear zones in subduction mélange may be geological manifestations of episodic tremor and slow slip
- Pages: 4754-4763 First Published:15 May 2018
- Frictionally locked portions of megathrusts create an updip stress shadow, which prevents shallow megathrusts from creeping regardless of frictional behavior
- Modeling the shallow thrust as an end‐member free‐slipping crack, the expected creep rate is below data resolution even in well‐instrumented convergent margins
- Many geodetic models commonly show low to zero coupling at the trench and thus may underestimate seismic and tsunami hazard of the shallow fault
Numerical Modeling of Dynamically Triggered Shallow Slow Slip Events in New Zealand by the 2016 Mw 7.8 Kaikoura Earthquake
- Pages: 4764-4772 First Published:16 May 2018
- We reproduce the timing and amplitude of spontaneous and triggered slow slip events (SSEs) in New Zealand using rate‐and‐state fault models
- SSE propensity to dynamic triggering mainly depends on the timing of perturbation with respect to the SSE cycle and the maximum Coulomb stress change
- Shallow SSEs are more likely to be dynamically triggered than deep SSEs because of enhanced stress perturbation (magnitude and duration) from the sedimentary wedge
March 2018
Coseismic slip deficit of the 2017 Mw 6.5 Ormoc Earthquake that occurred along a creeping segment and geothermal field of the Philippine Fault
- Ascending, descending InSAR displacements and SAR azimuth offset displacements help infer coseismic fault geometry and slip model
- The slip deficit underneath the Tongonan geothermal field suggests that high geothermal gradient could prevent the coseismic failure
- AbstractFull textPDF
Surface creep rate and moment accumulation rate along the Aceh segment of the Sumatran fault from L‐band ALOS‐1/PALSAR‐1 observations
- We processed ALOS‐1 data with a coherence‐based InSAR time‐series method to image the inter‐seismic deformation along the Sumatran fault.
- The InSAR observation reveals up to ~20 mm/yr of creep along a 100 km long section of the Aceh segment.
- We estimated the moment accumulation rate of this fault segment.
- AbstractFull textPDF
February 2018
A Multipixel Time Series Analysis Method Accounting for Ground Motion, Atmospheric Noise, and Orbital Errors
- A new inversion method for InSAR time series that considers all pixels simultaneously
- Incorporates a distance‐dependent covariance between pixels to describe atmospheric noise
- Allows reconstruction of displacement rates from low‐coherence data sets
- Abstract Full text PDF References Request permission
Contemporary Deformation of the North China Plain From Global Positioning System Data
- North China Plain is a region with high‐level of earthquake hazard but absence of detectable crustal deformation
- Interseismic deformation of the NCP takes place in an ~1,100 km wide left‐lateral shear zone of roughly east‐west orientation
- Permanent right‐lateral slips and block rotates on the NNE‐trending faults accommodate the left‐lateral transient shearing
January 2018
Earthquake Potential in California‐Nevada Implied by Correlation of Strain Rate and Seismicity
Authors: Yuehua Zeng, Mark D. Petersen, Zheng‐Kang Shen; Accepted manuscript online: 29 January 2018
- Earthquakes of M>6.5 occurred in regions of highest strain rate over the past century. Its rate has increased significantly since late 1980s
- From 1933 to the late 1980s, earthquakes of M>=4 were more diffused and broadly distributed in both high and low strain rate regions.
- From the late 1980s to 2016, earthquakes were more concentrated within the high strain rate areas focused on the major fault strands.
Tidal triggering of microearthquakes over an eruption cycle at 9°50'N East Pacific Rise
Authors: Yen Joe Tan, Maya Tolstoy, Felix Waldhauser, DelWayne R. Bohnenstiehl; Accepted manuscript online: 29 January 2018
- Tidal triggering signal is strong but does not vary systematically in the 2+ years leading up to an eruption.
- Tidal triggering signal disappears immediately post‐eruption.
- Tidal triggering variation may not be useful for forecasting eruptions over a 2+ years timscale but might be useful over a longer timescale.
Limitations on inferring 3D architecture and dynamics from surface velocities in the India‐Eurasia collision zone
Authors: L. Flesch, R. Bendick, S. Bischoff; Accepted manuscript online: 29 January 2018
- Tectonic velocities in the Indian‐Asian collision are explained by simple dynamic approximations.
- More complicated 3D dynamic models can be made but cannot be tested efficiently by surface velocity observations.
- Surface kinematics contain little or no information about 3D mechanics or dynamics in continental collisions.
Fault zone permeability decrease following large earthquakes in a hydrothermal system
Authors: Zheming Shi, Shouchuan Zhang, Rui Yan, Guangcai Wang; Accepted manuscript online: 29 January 2018
- Coseismic discharge and temperature decrease following two large earthquakes in Balazhang #1 hot spring are documented
- We used three different permeability models and a two end‐member mixing model to constrain the mechanism of the coseismic responses
- Earthquake‐induced fault zone permeability decrease that reduce the recharge of deep hot water is the mechanism
Real‐Time Detection of Rupture Development: Earthquake Early Warning Using P Waves From Growing Ruptures
Authors: Yuki Kodera; First Published: 11 January 2018
- P waves from large ruptures carry real‐time information on rupture growth
- A real‐time P wave detector was constructed to predict the seismic intensities of impending Swaves
- Incorporating such predictions into an earthquake early warning algorithm can increase lead times as much as several seconds
November 2017
Authors:M. Ichihara, S. Matsumoto; First Published: 4 November 2017
- A dense seismic array is used for calibration of seismic stations to improve accuracy of amplitude‐based source location
- Upward source migration with shallow inflation and/or minor precursory eruption was clearly detected as an indication of fluid movement
- Installing seismic stations including an array is important even after an eruption starts to understand processes before the eruption
Authors: Chunquan Wu, Eric G. Daub; First Published: 11 November 2017
- We use a BDF model to investigate the physical mechanisms of three different recurrence patterns of LFEs along SAF in central California
- Recurrence pattern of the output synthetic LFEs changes with the brittle failure length and ductile damping strength
- LFE zone of deep SAF between Monarch Peak and Parkfield is more fragmented and weaker than the surrounding fault segments
October 2017
Authors: Han Yue, Jorge C. Castellanos, Chunquan Yu, Lingsen Meng, Zhongwen Zhan
First Published: 3 October 2017
- Coherent radiators imaged by BP may not be earthquakes
- Localized water reverberations phases can be excited by the high bathymetry gradient near the trench
- General methods proposed to discriminate EQ and structure effects.
Authors: S. Katakami, Y. Yamashita, H. Yakihara, H. Shimizu, Y. Ito, K. Ohta; First Published: 13 October 2017
- Modified frequency scanning method detects very weak amplitude and shallow tectonic tremors
- Shallow tremors also show tidal responses that are typical for deep tremors
- Tidal responses of tremors appeared in the latter part of the migration episode, suggesting fault weakening caused by slow slip event
September 2017
Authors: Yingfeng Ji, Shoichi Yoshioka, Yuval A. Banay; First Published:18 September 2017
- Oblique subduction results in asymmetric thermal and dehydration regime especially beneath north Cascadia
- Three‐dimensional intraslab dehydration distribution is highly concerned with the 3‐D distribution of the slow and regular earthquakes in Cascadia
- Tectonic tremors occurring at Cascadia are very probably attributed to the slab amphibolization eclogitization and fluid overpressurization
Authors: Bertrand Rouet‐Leduc, Claudia Hulbert, Nicholas Lubbers, Kipton Barros, Colin J. Humphreys, Paul A. Johnson; First Published: 22 September 2017
- Machine learning appears to discern the frictional state when applied to laboratory seismic data recorded during a shear experiment
- Machine learning uses statistical characteristics of the recorded seismic signal to accurately predict slip failure time
- We posit that similar machine learning approaches applied to geophysical data in Earth will provide insight in fault frictional processes
Authors:Demian M. Saffer; First Published:19 September 2017
- Electrical resistivity maps fluid content along the subduction megathrust
- Patterns of resistivity correlate with geodetic locking
- The MT investigation provides support for hypotheses invoking variations in fluid content to explain fault slip behavior
Authors: Fred F. Pollitz, Tomokazu Kobayashi, Hiroshi Yarai, Bunichiro Shibazaki, Takumi Matsumoto; First Published: 9 September 2017
- Crustal motions following the 2016 Kumamoto, Japan, earthquake sequence were rapid for several months following the sequence
- Afterslip and viscoelastic flow of the ductile lower crust and upper mantle control the near‐field and far‐field deformation, respectively
- Inferred lower crust and mantle viscosity structure is consistent with the effects of temperature and water content on rock rheology
Authors: F. Kolawole, E. A. Atekwana, S. Malloy, D. S. Stamps, R. Grandin, M. G. Abdelsalam, K. Leseane, E. M. Shemang; First Published: 9 September 2017
- Coseismic surface displacement from DInSAR aligns with a distinct NW striking NE dipping magnetic lineament in the basement
- NW striking NE dipping magnetic lineament represents a thrust splay within the Precambrian Limpopo‐Shashe orogenic belt
- The earthquake focal mechanism is consistent with extensional reactivation of a crustal‐scale Precambrian thrust splay
August 2017
Authors: Fabio Corbi, Francesca Funiciello, Silvia Brizzi, Serge Lallemand, Matthias Rosenau; First Published:19 August 2017
- Abstract Full Text (HTML) PDF (1.0MB) References
- We use analog models simulating along‐strike rupture behavior of megathrust earthquakes, including asperities synchronization
- The barrier‐to‐asperity length ratio negatively correlates with maximum magnitude and seismicity rate
- The barrier‐to‐asperity length ratio controls the process of asperities synchronization and in turn the maximum earthquake magnitude
Authors: Renqi Lu, Xiwei Xu, Dengfa He, Suppe John, Bo Liu, Fuyun Wang, Xibin Tan, Yingqiang Li; First Published:19 August 2017
- The 2013 Lushan earthquake triggered by a blind fault is a hidden earthquake
- Seismotectonics of Lushan earthquake is related to simple shear fault‐bend folding
- Inversion tectonics occurred in the southern Longmen Shan during the Late Cenozoic
Authors: Zachary E. Ross, Christopher Rollins, Elizabeth S. Cochran, Egill Hauksson, Jean‐Philippe Avouac, Yehuda Ben‐Zion; First Published: 19 August 2017
- Approximately 155,000 aftershocks and geodetic observations illuminate two distinct processes driving the 2010 El Mayor‐Cucapah sequence
- Early aftershocks migrate away from the rupture terminus with the logarithm of time and were likely driven by afterslip
- Later aftershocks migrate with the square root of time and swarm‐like behavior and were likely driven by fluid diffusion
Authors:Emily E. Brodsky, Demian Saffer, Patrick Fulton, Frederick Chester, Marianne Conin, Katelyn Huffman, J. Casey Moore, Hung‐Yu Wu; First Published: 26 August 2017
- The maximum horizontal stress is 28° from the plate motion suggesting stress changes during the earthquake comparable to the ambient stress
- All possible solutions of the data require that the system was in a normal faulting regime 14 months after the 2011 Tohoku earthquake
- Extrapolating the stress state to the fault results in effective friction that is lower averaged during all of slip
Authors: R. Bendick, R. Bilham; First Published: 26 August 2017
- Large earthquakes are synchronized
- Therefore, the likelihood of earthquakes with particular characteristics varies in time in a quantifiable way
- Changes in length of day can excite sets of earthquakes with short renewal intervals
Authors: A. Koulali, S. McClusky, L. Wallace, S. Allgeyer, P. Tregoning, E. D'Anastasio, R. Benavente; First Published: 28 August 2017
- Observation of a slow, seismic and aseismic slip sequence at the northern Hikurangi margin
- First SSE documented northeast of the North Island, New Zealand
- A long‐lived transient observed north of the Hikurangi margin following the Mw 7.1
Authors: A. Gualandi, C. Nichele, E. Serpelloni, L. Chiaraluce, L. Anderlini, D. Latorre, M. E. Belardinelli, J.‐P. Avouac; First Published: 5 August 2017
- Independent Component Analysis of GPS time series detects small tectonic deformation transient in slow strain‐rates region
- Seismic and geodetic data reveal large aseismic contribution for a swarm‐like activity in a normal fault environment
- The transient slip decreased Coulomb stress on the locked portion of an active low‐angle normal fault
Authors: D. Roten, K. B. Olsen, S. M. Day; First Published: 11 August 2017
- We perform dynamic rupture simulations of the 1992 Landers earthquake with inelastic response in the fault damage zone
- Plastic yielding in fractured fault zones results in a shallow slip deficit of approximately 25‐95% and off‐fault deformations between approximately 20 and 90%
- Simulated off‐fault deformations obtained for moderately fractured rocks are consistent with values reported from aerial image correlations
July 2017
Authors: M. Staszek, B. Orlecka‐Sikora, K. Leptokaropoulos, G. Kwiatek, P. Martínez‐Garzón; First Published: 22 July 2017
- We examined significance of temporal static stress drop changes in relation to injection rate variations at The Geysers geothermal field
- Variations of static stress drop in time are statistically significant
- Changes of static stress drop are inversely related to injection rate fluctuations
Authors: Victor C. Tsai, Daniel C. Bowden, Hiroo Kanamori; First Published: 28 July 2017
- Ground motion in Osaka Basin during the Tohoku earthquake was unexpectedly large
- Surface‐waves are locally amplified by structure differently than body waves
- Accounting for effects of structure in Osaka Basin on surface‐waves explains anomalous extreme ground motions during the Tohoku earthquake
Authors: Yefei Bai, Thorne Lay, Kwok Fai Cheung, Lingling Ye; First Published: 3 July 2017
- The 2016 Kaikoura earthquake produced tsunami signals that indicate sizeable seafloor deformation in addition to onshore surface ruptures
- Iterative modeling of teleseismic P and SH waves and regional tide and wave gauge recordings indicates two regions of seafloor deformation
- Tsunami excitation involved oblique thrusting on the southern Hikurangi megathrust and offshore extension of transpressional faults
Authors: Anieri M. Morales Rivera, Falk Amelung, Patricia Mothes, Sang‐Hoon Hong, Jean‐Mathieu Nocquet, Paul Jarrin; First Published: 3 July 2017
- InSAR supported by CGPS measurements confirm precursory inflation prior to the 2015 eruptions at Cotopaxi volcano
- Deformation is attributed to an opening sheet intrusion beneath the SW flank that contributed to internal edifice growth
- Preexisting structures may guide ascending magma under the volcano's SW flank, explaining the noncentrality of the observed deformation
Authors: S. Ruiz, M. Moreno, D. Melnick, F. del Campo, P. Poli, J. C. Baez, F. Leyton, R. Madariaga; First Published: 3 July 2017
- The 2016 Chiloe earthquake is a sign of the seismic reactivation of the south central Chile megathrust after the Mw 9.5 earthquake of 1960
- South central Chile has been affected by postseismic viscoelastic relaxation and superinterseismic locking after the 2010 Maule earthquake
- The Chiloe earthquake broke an ~15 km radius area at ~30 km depth, near the bottom of the seismogenic zone
Authors: Ting Yang, Michael Gurnis, Zhongwen Zhan; First Published: 3 July 2017
- Variation in trench retreat velocity controls the observed slab morphology in Izu‐Bonin subduction zone
- The 30 May 2015 Bonin Islands earthquake may be explained as the result of Pacific slab buckling due to slow trench retreat
- Subducted slab is inherently heterogeneous due to nonlinear viscosity, contributing to the occurrences of isolated deep earthquakes
Authors: Masashi Kawamura, Kate Huihsuan Chen; First Published: 5 July 2017
- We explore where earthquakes tend to recur using frequency‐magnitude distribution
- Repeating earthquakes occur within areas with high a values ~3 and high b values ~1
- The productivity of microearthquakes is the key factor controlling the location of repeating earthquakes
Authors: Ana C. Aguiar, Kevin Chao, Gregory C. Beroza; First Published: 6 July 2017
- Method to find new low‐frequency earthquake (LFE) templates
- Triggered and ambient tremor share a common source
- LFEs and therefore tremor locate on the deep extension of the Chaochou‐Lishan Fault
June 2017
Authors: Hiroaki Kobayashi, Kazuki Koketsu, Hiroe Miyake; First Published: 17 June 2017
- Multisegment fault models for the 2016 Kumamoto earthquake sequence are constructed
- Rupture processes are jointly inverted by strong motion, telesesmic, and geodetic data
- Near‐fault pulse‐like ground motions are caused by rupture directivity, slip rate, and nearly simultaneous slips over subparallel faults
Authors: A. Gualandi, H. Perfettini, M. Radiguet, N. Cotte, V. Kostoglodov; First Published: 27 June 2017
- Variational Bayesian independent component analysis allows separation of different tectonic signals in GPS position time series
- Aseismic behavior found in the Guerrero gap helps explain lack of earthquakes
- Slow slip events in Guerrero are the manisfestation of a quasiperiodic phenomenon
Authors: Omid Dorostkar, Robert A. Guyer, Paul A. Johnson, Chris Marone, Jan Carmeliet; First Published: 28 June 2017
- We study hydromechanical coupling mechanisms in granular fault gouge undergoing particle rearrangements and fluid flow during failure
- Fluid flow and the spatiotemporal distribution of effective pressure affect particle arrangement
- Comparison of dry versus fluid‐saturated cases shows that fluids tend to stabilize shear and increase the recurrence time of slip events
Authors: Ryuta Arai, Shuichi Kodaira, Tomoaki Yamada, Tsutomu Takahashi, Seiichi Miura, Yoshiyuki Kaneda, Azusa Nishizawa, Mitsuhiro Oikawa; First Published: 28 June 2017
- We find a subducting seamount and a displacement across the plate interface in the northern Ryukyu Trench
- High‐angle normal‐fault earthquakes intersecting the slab occurred in front of the subducting seamount
- Buoyant seamounts/plateaus can produce differential stress leading to large normal‐fault earthquakes in the slab
Authors: William B. Frank, Piero Poli, Hugo Perfettini; First Published: 3 June 2017
- Dense aftershock catalog reveals how plate interface responds to megathrust earthquake
- Evolution of fault rheology, frictional parameters, and tectonic stressing rate constrained in depth
- Aseismic afterslip along the plate boundary complements coseismic deformation and drives aftershock activity
May 2017
Authors: Wenbin Xu; First Published: 21 May 2017
- Coseismic deformation field is mapped for 2016 Mw 7.5 Chiloé earthquake, southern Chile
- Source parameters of this event are estimated based on Sentinel‐1 SAR data and range offsets
- Seismic hazard is assessed in southern Chile
Authors: Hao Zhang, Keith D. Koper, Kristine Pankow, Zengxi Ge; First Published: 21 May 2017
- Unilateral rupture to the northeast with an average velocity of 1.4–1.6 km/s and total duration of ~100 s
- Multiple faults within the Marlborough system were activated during the rupture
- Peak ground acceleration near the source is better correlated with areas of short‐period energy release than with areas of large slip
Authors: Guoming Liu, Chenyu Li, Zhigang Peng, Xuemei Li, Jing Wu; First Published: 28 May 2017
- Microearthquakes in Changbaishan Volcano were dynamically triggered by large distant earthquakes
- Long‐period surface waves are more efficient in triggering microseismicity
- Five nuclear explosions in North Korea did not trigger microseismicity in Changbaishan Volcano
April 2017
Authors: Satoshi Annoura, Tetsuo Hashimoto, Noriko Kamaya, Akio Katsumata; First Published: 24 April 2017
- We investigated episodic tremor activity near the Nankai Trough axis by using DONET data
- Migration and triggering properties similar to those of deep tremor were observed
- Source locations were near the initiation points of past megathrust earthquakes near the Nankai Trough
Authors: Kenji Yasuda, Keiichi Tadokoro, Sota Taniguchi, Hiroshi Kimura, Kenjiro Matsuhiro; First Published: 24 April 2017
- We observed two stations of the seafloor crustal deformation across the Central Nankai Trough
- The velocities of the model and observation have no significant difference near the Nankai Trough on the Philippine Sea Plate
- The estimated plate coupling is 40‐100% in the shallowest segment of the Central Nankai Trough
Authors: Brent G. Delbridge, Saeko Kita, Naoki Uchida, Christopher W. Johnson, Toru Matsuzawa, Roland Bürgmann; First Published: 24 April 2017
- Intermediate‐depth earthquake rates are evaluated before and after the 2011 M9.0 Tohoku‐oki earthquake
- We find no evidence for precursory intermediate‐depth seismicity accelerations prior to the mainshock
- We observe evidence for intermediate‐depth seismicity rates responding to deep aseismic slip rate changes on the plate boundary thrust
AuthorsL James Hollingsworth, Lingling Ye, Jean‐Philippe Avouac; First Published: 21 April 2017
- We clarify the complex rupture process for the 2016 Kaikoura earthquake by using a combined analysis of optical satellite and seismology data
- The Kaikoura earthquake involved major coseismic slip on several previously unknown faults
- Simultaneous coseismic slip occurred on the Kekerengu Fault (strike‐slip) and a deeper shallow‐dipping fault (oblique‐slip)
Authors: Mikhail G. Kogan, Dmitry I. Frolov, Nikolay F. Vasilenko, Jeffrey T. Freymueller, Grigory M. Steblov, Göran Ekström, Nikolay N. Titkov, Alexandr S. Prytkov; First Published: 14 April 2017
- We consider three models of the transform plate boundary at the far western Aleutians
- GPS velocities on the far western Aleutians are best fit by the model with a rigid Komandorsky block at the boundary
- Our best fitting model suggests that the Komandorsky block moves westward toward Kamchatka at the secular speed of 51 mm/a
Authors: Ka Lok Li, Hamzeh Sadeghisorkhani, Giulia Sgattoni, Olafur Gudmundsson, Roland Roberts; First Published: 14 April 2017
- A back‐projection method is introduced for locating tremor sources using the products of cross‐correlation envelopes
- The method better suppresses correlated and uncorrelated noise and gives a more robust estimate of locations than the common single‐correlation approach
- The method is demonstrated by synthetic examples and a real‐data example from tremor at Katla Volcano, Iceland, in 2011
Authors: Jianghui Geng, Peng Jiang, Jingnan Liu; First Published: 14 April 2017
- GPS sidereal filtering can potentially amplify errors on the lowest frequency band of a high‐rate displacement time series
- Integration with GLONASS reduces the noise of high‐rate GPS by up to 40% over the entire frequency band of a displacement time series
- High‐rate multi‐GNSS can be enhanced by sidereal filtering which should be carefully implemented to avoid complicating the noise spectrum
Authors: E. Klein, Z. Duputel, F. Masson, H. Yavasoglu, P. Agram; First Published: 10 April 2017
- We propose a probabilistic interseismic model of the main Marmara Sea fault
- Our Bayesian analysis suggest creep in the central segments with large uncertainties due to the paucity of GPS stations in this area
- We implement a network optimization procedure to identify the most favorable distribution of stations in the Marmara Sea
March 2017
Authors: Manoochehr Shirzaei, Roland Bürgmann, Eric J. Fielding; First Published: 28 March 2017
- New algorithm for the first Sentinel‐1 deformation time series
- Updated creep rate along Hayward and Calaveras faults using Sentinel‐1
- Measuring coastal subsidence and aquifer recharge using Sentinel‐1
Authors: Paul A. Selvadurai, Steven D. Glaser, Jessica M. Parker; First Published: 28 March 2017
- Quasi‐static precursors are observed in the laboratory and the rupture speed and stress drop scaled to slow slip events (SSEs) in nature
- Precursors only appeared at higher fault normal stress and showed similar slip evolution patterns to the 2013–2014 Boso SSE in Japan
- A novel friction law promotes the destabilization of a quasi‐static precursor with increased normal stress, which followed our experiments
Authors: Shin‐Chan Han; First Published: 28 March 2017
- Discovery and quantification of seasonal mode of continental 3‐D deformation, induced by atmospheric and hydrological cycles
- Observation of widespread subsidence during the 2010‐2011 La Nina and ongoing uplift afterward
- Demonstration of geodetic data as new ways of observing water cycle components
Authors: Sergey V. Samsonov, Wanpeng Feng, Yuri Fialko; First Published: 25 March 2017
- Ground deformation time series in the vicinity of Cerro Prieto Geothermal Field from RADARSAT‐2 DInSAR during 2011–2016
- Stress changes due to fluid extraction at Cerro Prieto Geothermal Field affected coseismic and postseismic slip on the Indiviso fault
- Observed afterslip on 2010 M7.2 El Mayor‐Cucapah earthquake fault continues for 6 years after the main shock
Authors: Toshinori Sato, Seiya Hasegawa, Akihiro Kono, Hajime Shiobara, Takeo Yagi, Tomoaki Yamada, Masanao Shinohara, Norihisa Usui; First Published: 25 March 2017
- A new method for extracting transient deformation due to a targeted event from a single ocean bottom pressure station was developed
- Uplift of 2 cm with an accuracy of 1 cm was detected and objectively confirmed by using Akaike's information criterion
- Ocean bottom pressure observation and the developed method improved the estimation of the SSE slip distribution under the ocean
Authors: Phoebe M. R. DeVries, T. Ben Thompson, Brendan J. Meade; First Published: 21 March 2017
- With trained artificial neural networks, viscoelastic calculations can be accelerated by more than ~55,000%
- Massive viscoelastic calculations, across large spatial and temporal scales and ranges of model parameters, may now take minutes to hours
- These new representations of viscoelastic physics may lead to basic advances in the understanding of the underlying phenomenology
Authors: S. Pucci, P. M. De Martini, R. Civico, F. Villani, R. Nappi, T. Ricci, R. Azzaro, C. A. Brunori, M. Caciagli, F. R. Cinti, et al; First Published: 4 March 2017
- Detailed documentation of subtle primary coseismic surface faulting induced by moderate magnitude earthquake masked by later seismic event
- Contribute to the worldwide database of the moderate earthquakes surface faulting events in extensional domains
Authors: Paul M. Morgan, Lujia Feng, Aron J. Meltzner, Eric O. Lindsey, Louisa L. H. Tsang, Emma M. Hill; First Published: 4 March 2017
- The 2002 Mw 7.3 and 2008 Mw 7.4 Simeulue earthquakes are “sibling” earthquakes that resemble each other and largely overlap
- These two ruptures slipped an isolated, locked asperity within a persistent rupture barrier to great earthquakes
- The rupture terminations and seismic asperity under Simeulue may be structurally controlled by a subducting morphological high of the slab
February 2017
Authors: Houjun Jiang, Guangcai Feng, Teng Wang, Roland Bürgmann; First Published: 25 February 2017
- Methods to fully exploit Sentinel‐1 TOPS images for large displacement
- Improved near‐field coseismic displacements of the Kumamoto earthquake
- More shallow slip after adding near‐field constraints
Authors: Shaoyang Li, Marcos Moreno, Jonathan Bedford, Matthias Rosenau, Oliver Heidbach, Daniel Melnick, Onno Oncken; First Published: 25 February 2017
- Uplift in the Andes and subsidence in the hinterland are observed in the 6 years following the 2010 Maule earthquake
- A geodetic data‐driven modeling strategy is used to infer a heterogeneous viscosity distribution in the subcontinental mantle
- Viscosity distribution correlates with the first‐order thermomechanical transition from volcanic arc to craton area
Authors: Johanna M. Nevitt, David D. Pollard; First Published: 18 February 2017
- Mylonitized granodiorite is observed adjacent to fault tips and within fault steps exhumed from the brittle‐ductile transition
- Field observations and finite element models indicate plastic deformation near fault tips enhances slip magnitudes and gradients
- Slip transfer is greater across contractional steps, relative to extensional ones, due to the stress state and resulting plasticity there
Authors: Scott T. Marshall, Gareth J. Funning, Hannah E. Krueger, Susan E. Owen, John P. Loveless; First Published: 13 February 2017
- Two models proposed for Ventura‐Pitas Point fault are tested using mechanical models: (1) ramp model and (2) a constant dip model
- Models of the ramp geometry for the Ventura‐Pitas Point fault system better fit geologic slip rate and vertical GPS deformation patterns
- Mechanical models of the SCEC CFM5.0 fit regional slip rate and GPS data better than previous CFM versions
Authors: Egill Hauksson, Men‐Andrin Meier, Zachary E. Ross, Lucile M. Jones; First Published: 9 February 2017
- Frequent clusters have increased seismicity rates near the southernmost San Andreas Fault (SAF) since the 1979 Imperial Valley earthquake
- The 2001, 2009, and 2016 clusters included M4 events in the vicinity of the SAF but caused mostly negative Coulomb stress changes on SAF
- Triggering a major rupture on SAF that has not ruptured for ~320 years may require larger or more numerous close events
Authors: Mong‐Han Huang, Eric J. Fielding, Cunren Liang, Pietro Milillo, David Bekaert, Douglas Dreger, Jacqueline Salzer; First Published: 4 February 2017
- InSAR can provide coseismic displacement or other hazard response typically within a few days
- Nearly all of the slip occurred between 3 and 5 km in depth but extends about 20 km along strike
- The triggered landslide on the Monte Vettore fault may contribute additional fault offset and influence the long‐term fault slip rate
January 2017
Authors: M. Palano, C. Piromallo, C. Chiarabba; First Published: 28 January 2017
- GPS velocities show crustal toroidal patterns around the two slab hinges, while at depth SKS‐based mantle flow field reveals an asymmetry
- Rotations occur at active lithospheric tears, currently accommodating the southeastward migration of the subduction system
Authors: Daniel Melnick, Marcos Moreno, Javier Quinteros, Juan Carlos Baez, Zhiguo Deng, Shaoyang Li, Onno Oncken; First Published: 27 January 2017
- A decade of GPS measurements across the Andes image the megathrust seismic cycle before and between two great earthquakes in Chile
- Enhanced shear stress after a great earthquake drives transient super‐interseismic phase in adjacent megathrust segments
- Increased plate locking and super‐interseismic strain rates after the 2010 earthquake (M8.8) possibly triggered the 2015 event (M8.3)
Authors: Yajun Peng, Allan M. Rubin; First Published: 26 January 2017
- High‐resolution tremor catalogs beneath Guerrero, Mexico, reveal significant slip complexity during episodic tremor and slip events
- Propagation speeds of tremor migrations decrease systematically with recurrence interval and are likely controlled by changes in slip rate
- A mechanism could be host rock permeability increases induced by slip and subsequent healing that control the speed limit of slow slip
Authors: O. Zielke, M. Galis, P. M. Mai; First Published: 26 January 2017
- The observed discrepancy between laboratory‐ and field‐based stress drop estimates can be linked to fault roughness and strength asperities
- Field‐based estimates are biased low, not considering fault roughness. Lab‐based estimates are biased high, representing “only” asperities
- Smooth faults require lower stress drops than rough ones to generate the same‐size earthquake, suggesting that the prior are, respectively, weaker
Authors: W. L. Yeck, G. P. Hayes, D. E. McNamara, J. L. Rubinstein, W. D. Barnhart, P. S. Earle, H. M. Benz; First Published: 21 January 2017
- The 3 September 2016, Mw 5.8 Pawnee earthquake is the largest event recorded in Oklahoma, rupturing along a previously unmapped basement fault
- In 2016, the rate of M3 and greater earthquakes in Oklahoma has decreased, but the cumulative moment has increased
- Observations from this and other Oklahoma earthquakes point to the difficulty in mitigation after years of fluid injection
Authors: Qiong Zhang, Guoqing Lin, Zhongwen Zhan, Xiaowei Chen, Yan Qin, Shimon Wdowinski; First Published: 21 January 2017
- Remote triggering in geothermal fields is different from surrounding areas
- Geothermal production affects subsurface fracture network within geothermal fields
- Differential pore pressure primarily controls remote triggering in geothermal areas
Authors: Jun Kameda, Atsushi Okamoto, Kiminori Sato, Koichiro Fujimoto, Asuka Yamaguchi, Gaku Kimura; First Published: 17 January 2017
- In situ chert sample was recovered from an active subduction margin
- The chert is dominated by opal‐CT and may be deformable via pressure solution creep
- Chert diagenesis may be related to physical transition of subduction zone plate boundary
Authors: Yoshihiro Kaneko, Brett M. Carpenter, Stefan B. Nielsen; First Published: 13 January 2017
- Models of earthquake nucleation have been developed using SAFOD data and measurements of friction properties of drill core samples
- The nucleation process of M 2 repeaters near the SAFOD observatory may consist of two distinct phases, like in that of laboratory earthquakes
- Our results indicate that the precursory signals of anticipated M 2 earthquakes could be captured by near‐field strain observations
Authors: L. N. Schaefer, T. Wang, R. Escobar‐Wolf, T. Oommen, Z. Lu, J. Kim, P. R. Lundgren, G. P. Waite; First Published: 9 January 2017
- Three‐dimensional displacements of a volcanic landslide created using pixel offset measurements between two synthetic aperture radar amplitude images
- Four meters of flank movement at Pacaya Volcano suggest serious instability hazard
- Episodic movement initiated by rapid triggers may promote volcano edifice instability without timely warning
December 2016
Authors: Camilla Cattania, Jeffrey J. McGuire, John A. Collins; First Published: 2016
- We perform a systematic search for dynamic triggering on three transform faults located along the equatorial East Pacific Rise
- Fault segments with low seismic coupling and high rates of microseismicity are more sensitive to dynamic triggering
- Surface waves that produce the highest normal stress changes and the largest first strain invariant appear more effective at triggering
Authors: Jinlai Hao, Chen Ji, Zhenxin Yao; First Published: 2016
- Slip history of 2016 Kumamoto earthquake constrained by local and teleseismic waveforms
- The rupture broke through a 30 degree fault intersection without notable delay
- Wedge‐shape asperity boundary near Aso volcano marks the bottom of seismogenic zone
Authors: Zoe K. Mildon, Shinji Toda, Joanna P. Faure Walker, Gerald P. Roberts; First Published: 26 December 2016
- Current Coulomb stress models of planar faults are not representative of true fault geometries
- New method presented here creates strike‐variable faults from many rectangular patches that works within Coulomb 3.4
- There are substantial differences between planar versus strike‐variable fault transferred stresses so past earthquakes should be re‐examined
Authors: Anais Marechal, Stephane Mazzotti, Rodolphe Cattin, Gael Cazes, Philippe Vernant, Dowchu Drukpa, Kinzang Thinley, Alizia Tarayoun, Romain Le Roux‐Mallouf, Bal Bahadur Thapa, et al; First Published: 26 December 2016
- New detailed GPS velocity field in Bhutan showing lateral variations of interseismic coupling
- Decoupled upper ramp of the Main Himalayan Thrust in eastern Bhutan
- Potential first evidence of transient events on the Main Himalayan Thrust
Authors: G. Lavecchia, R. Castaldo, R. de Nardis, V. De Novellis, F. Ferrarini, S. Pepe, F. Brozzetti, G. Solaro, D. Cirillo, M. Bonano, et al
First Published: 26 December 2016
- Investigation of the ground deformation and source geometry of the 2016 Amatrice earthquake (Central Italy)
- Coseismic displacements modeling through a 3‐D finite elements approach jointly exploiting DInSAR measurements and a 3‐D fault model
- Evidence of a bilateral rupture propagating along two en echelon normal faults conjoined at the hypocenter
Authors: Phoebe M. R. DeVries, Eileen L. Evans; First Published: 12 December 2016
- We test viscoelastic earthquake cycle models for consistency with 15 sets of observations across major strike‐slip faults
- Kolmogorov‐Smirnov hypothesis tests allow the rejection of a large subset of viscoelastic models at a significance level of 0.05
- Model predictions of earthquake cycle timing are consistent with geologic and historical records on the Owens Valley and Altyn Tagh faults
November 2016
Authors: S. Daout, S. Barbot, G. Peltzer, M.‐P. Doin, Z. Liu, R. Jolivet; First Published: 9 November 2016
- We use a Bayesian approach to identify fault geometry and slip rates compatible with geodesy and conservation of motion
- The surface velocity field in Southern California is in agreement with a large‐scale decollement that partitions deep‐seated motion
- Structural geology and long‐term slip compatibility laws help constraining the kinematics of buried faults below Los Angeles
Authors: Linyan Li, Kwok Fai Cheung, Han Yue, Thorne Lay, Yefei Bai; First Published: 8 November 2016
- Modeling of tsunami generation from seafloor deformation leads to depth‐dependent attenuation and spreading of initial waves at the source
- Dispersion complements depth‐dependent tsunami excitation through lagging of short‐period components during trans‐oceanic propagation
- Including depth‐dependent tsunami excitation and dispersion in Green's functions produces larger and more concentrated slip through inversion
October 2016
Authors: Mahesh N. Shrivastava, Gabriel González, Marcos Moreno, Mohamed Chlieh, Pablo Salazar, C. D. Reddy, Juan Carlos Báez, Gonzalo Yáñez, Juan González, Juan Carlos de la Llera; First Published: 28 October 2016
- Coseismic slip of the 2015 Illapel earthquake from cGPS data occurred in a highly locked interseismic region
- Postseismic afterslip following the Illapel earthquake
- The Challenger Fault Zone (CFZ) and the Juan Fernandez Ridge (JFR) played the role of barrier to seismic rupture
Authors: E. Tinti, L. Scognamiglio, A. Michelini, M. Cocco; First Published: 28 October 2016
- Rupture history of the 2016 Amatrice (Italy) normal faulting earthquake
- Rupture directivity affecting damage pattern during the ML 6.0, 2016, Amatrice (Italy) earthquake
- Slip heterogeneity characterizing moderate‐magnitude normal faulting earthquakes in the Apennines
Authors: Pieter‐Ewald Share, Yehuda Ben‐Zion; First Published: 25 October 2016
- Fault zone head waves image two separate bimaterial interfaces in the Southern San Andreas Fault
- The interfaces have opposite velocity contrasts to the NW and SE from San Gorgonio Pass
- Subshear earthquakes will tend to propagate to the NW and SE from San Gorgonio Pass
Authors: Abhey Ram Bansal, Dongdong Yao, Zhigang Peng, Dimas Sianipar; First Published: 21 October 2016.
- We find three new sites of remotely triggered activity in South/Southeast Asia following the 2012 Indian Ocean earthquake
- Triggered tremors/earthquakes mostly occurred during the large‐amplitude Rayleigh waves and were close to active faults
- We did not find any clear evidence of remotely triggered seismicity along the Sumatra subduction zone and northeastern Himalaya frontal thrusts
Authors: Junle Jiang, Yuri Fialko; First Published: 21 October 2016
- A transition zone with heterogeneous frictional properties may explain microseismicity much below the geodetic locking depth
- Large earthquakes can penetrate beyond the geodetic locking depth to the deepest extent of seismicity, with complexity in downdip ruptures
- Our model predicts deep aseismic transients that can be potentially detected by modern geodetic techniques
Authors: E. Calais, T. Camelbeeck, S. Stein, M. Liu, T. J. Craig; First Published: 18 October 2016
- SCR earthquakes result from transient perturbations of local stress or fault strength releasing strain from a prestressed lithosphere
- SCR earthquakes can occur in regions with no seismicity or surface evidence for strain accumulation and need not repeat
- Seismic hazard is more spatially distributed than indicated by paleoearthquakes, current seismicity, or geodetic strain rates
Authors: Jens‐Erik Lund Snee, Mark D. Zoback; First Published: 15 October 2016
- Addition of approximately 200 new stress orientations in Texas enables us to map the complex stress field throughout the state
- Recent earthquakes in four study areas occurred on critically stressed faults in which slip was apparently triggered by industrial activity
Authors: Susan L. Bilek, Holly M. M. Rotman, W. Scott Phillips; First Published: 11 October 2016
- Earthquake source parameters presented for 216 earthquakes along Pacific coast of Nicaragua and Costa Rica
- Stress drop is lower for earthquakes within the 1992 tsunami earthquake rupture zone
- Results suggest that microseismicity can provide indication of anomalous rupture zones
Authors: A. Vallage, Y. Klinger, R. Lacassin, A. Delorme, M. Pierrot‐Deseilligny; First Published: 9 October 2016
- High‐resolution quantification of the 2013 Balochistan earthquake displacement from optical image correlation
- Characterization of the frontal rupture geometry, based on 1:500 scale ground surface rupture mapping, inside the coseismic damage zone
- Preexisting geological structures and state of stress control on earthquake rupture propagation and geometrical complexities
Authors: Valère Lambert, Sylvain Barbot; First Published: 9 October 2016
- We present a framework for fully coupled nonlinear fault and mantle dynamics using the integral method
- Earthquakes and slow‐slip events can trigger viscoelastic relaxation, contributing significantly to far‐field deformation for large events
- Onset of viscous flow during the early postseismic period, potentially within minutes of the coseismic rupture
Authors John P. Loveless, Chelsea P. Scott, Richard W. Allmendinger, Gabriel González; First Published: 9 October 2016
- We estimate coseismic slip of the 2014 Pisagua earthquake sequence using geologic data
- Coseismically generated surface cracks systematically vary in orientation along the coastline
- The slip distributions are consistent with estimates from geodetic and seismic data
Authors: William B. Frank. First Published: 9 October 2016
- Tectonic tremor and low‐frequency earthquakes used to extract slow slip out of the geodetic noise
- Interaseismic loading is interrupted by slow slip events that generate surface deformations less than 1 mm
- Transient stress release on many time scales shows that plate interfaces are strongly coupled where slow slip occurs
Authors: C. W. D. Milliner, J. F. Dolan, J. Hollingsworth, S. Leprince, F. Ayoub
First Published: 7 October 2016
- Hector Mine near‐field surface deformation measured from air photo correlation is compared to Landers deformation (Milliner et al., 2015)
- Landers and Hector Mine had significant distributed deformation 46% and 39% over average fault widths of 154 m and 121 m, respectively
- Field measurements underestimate fault slip due to distributed strain thus affecting empirical scaling laws and geologic slip rates
Authors: Keisuke Yoshida, Akira Hasegawa, Tatsuhiko Saito, Youichi Asano, Sachiko Tanaka, Kaoru Sawazaki, Yumi Urata, Eiichi Fukuyama
First Published: 6 October 2016
- Change in stress field was detected in the focal area of the 2016 Kumamoto earthquake sequence
- Significant portion of shear stress was released by the M6.5 foreshock as well as the M7.3 main shock
- Main shock occurrence might be caused by the stress release in the shallower part of the fault segment due to the foreshock
September 2016
Authors: Manuel M. Mendoza, Abhijit Ghosh, Shyam S. Rai
First Published: 28 September 2016
- We observe dynamic triggering in the central Himalaya seismic gap by a large remote earthquake at teleseismic distance
- An elevated level of seismicity is sustained for at least a week
- Triggered slow slip and/or the cascade model may explain this protracted high level of seismicity
Authors: Wenbin Xu, Sigurjón Jónsson, Joël Ruch, Yosuke Aoki
First Published: 28 September 2016
- The 2015 Wolf volcano (Galápagos) eruption studied using both Sentinel‐1A and ALOS‐2 satellite radar data
- Coeruption deformation explained with two magma reservoirs at 1 km and 5 km depths below sea level that may be hydraulically connected
- Observed ground deformation may have been influenced by ring fault activity
Authors: M. Sachpazi, M. Laigle, M. Charalampakis, D. Sakellariou, E. Flueh, E. Sokos, E. Daskalaki, A. Galvé, P. Petrou, A. Hirn
First Published: 28 September 2016
- Joint observations of seismic activity and structure
- Offshore extension of the SW Hellenic slab top segmentation
- Mw 6.8 Methoni interplate hypocenter and rupture pattern relation with slab segmentation, upper plate deformation, and bathymetric features
Authors: D. M. Moreira, S. Calmant, F. Perosanz, L. Xavier, O. C. Rotunno Filho, F. Seyler, A. C. Monteiro
First Published: 28 September 2016
- Crustal displacements derived from GRACE and hydrological models
- Vertical component of GPS time series over the Amazon basin
- Historical flood and drought in the Amazon basin
Authors: Lujia Feng, Sylvain Barbot, Emma M. Hill, Iwan Hermawan, Paramesh Banerjee, Danny H. Natawidjaja
First Published: 23 September 2016
- Five years of afterslip following the 2010 Mw 7.8 Mentawai earthquake released postseismic moment equivalent to a Mw 7.6 earthquake
- The 2010 afterslip progressed downdip relative to the 2010 coseismic rupture
- Stress changes from the coseismic slip and afterslip of the 2007 Mw 8.4 Bengkulu sequence affected the evolution of the 2010 afterslip
Authors: J. Schmittbuhl, H. Karabulut, O. Lengliné, M. Bouchon First Published: 23 September 2016
- First observation of long‐lasting seismic repeaters on the NAF
- A long‐term recurrence time of 8 months
- The cumulative slip of the repeaters is compatible with the tectonic loading
Authors: Ian Pierce, Steven G. Wesnousky
Accepted manuscript online: 31 August 2016
- Previous interpretation of 800 km rupture along Himalayan Frontal Thrust compromised by incorrect interpretation of trench logs
- Misuse of Oxcal has lead to unsubstantiated assertion that 1255 AD earthquake ruptured specific 800 km section of Himalayan Frontal Thrust
- Defining extent of rupture during the historically damaging Nepal earthquake of 1255 AD remains problematic
August 2016
Authors: Masumi Yamada, Jim Mori, Yuki Matsushi
Accepted manuscript online: 31 August 2016
- We found tiny repeating earthquakes with similar waveforms during the few hours preceding the 2015 Rausu landslide
- This sequence is interpreted as small scale stick‐slip movement leading up to the catastrophic landslide failure
- We found that heterogeneous structure, such as asperities on the slip surface, can play an important role in the initiation of landslides
Authors: Konstantinos Chousianitis, A. Ozgun Konca, G.‐Akis Tselentis, Gerassimos A. Papadopoulos, Michail Gianniou
First Published: 14 August 2016, Vol: 43, Pages: 7973–7981, DOI: 10.1002/2016GL069764
- Two principal asperities were recovered southwest of the epicenter at a depth of 5 km
- The Lefkada segment of the CTFZ can be divided into two parts in terms of rupture segmentation
- Differential strain rate pattern onshore Lefkada revealed preseismic deformation
Authors: Thorne Lay, Lingling Ye, Charles J. Ammon, Audrey Dunham, Keith D. Koper
First Published: 4 August 2016, Vol: 43, Pages: 7937–7945, DOI: 10.1002/2016GL069931
- The 2016 earthquake has little seismic wave directivity for an Mw 7.8 strike‐slip faulting event
- Aftershocks, surface waves, and finite fault inversions indicate north‐south rupture ≤70 km long
- The static stress drop is ~20 MPa, a high value similar to other events in the intraplate deformation zone
July 2016
Authors: Matthew W. Herman, Kevin P. Furlong
First Published: 28 July 2016, Vol: 43, Pages: 7503–7510, DOI: 10.1002/2016GL069528
- Mw 5.7 earthquake ruptured offshore to the east of Christchurch, New Zealand
- Earthquake occurred in area of 2010–2012 Canterbury earthquake sequence after 3 years of decaying activity
- Recent earthquake and regional stress modeling hint at seismic hazard remaining in Christchurch vicinity
Authors: Mong‐Han Huang, Hsin Tung, Eric J. Fielding, Hsin‐Hua Huang, Cunren Liang, Chung Huang, Jyr‐Ching Hu
First Published: 20 July 2016, Vol: 43, Pages: 7459–7467, DOI: 10.1002/2016GL069351
- Shallower fault slip was triggered by median size deeper earthquake
- Ascending and descending InSAR reveals detailed coseismic surface deformation and helps constrain fault slip at different depths
- Evidence of triggered slip on a shallower duplex thrust structure and this deformation are inferred to be slow or aseismic
Authors: Fiona Clerc, Rebecca M. Harrington, Yajing Liu, Yu Jeffrey Gu
First Published: 14 July 2016, Vol: 43, Pages: 6942–6951, DOI: 10.1002/2016GL069800
- Stress drops of induced earthquakes are on the high end of the normal range (5–80 MPa)
- Stress drops do not vary with depth or distance from the well, and no scaling is observed for Mw 3–4
- Stress drops alone are insufficient in the differentiation of induced and tectonic events
Authors: Kate Huihsuan Chen, Iyin Chen, Ahyi Kim
First Published: 12 July 2016, Vol: 43, Pages: 6916–6923, DOI: 10.1002/2016GL069516
- Slip heterogeneity of earthquakes is linked to their recurrence properties
- The quasiperiodic repeating events have persistent slip distribution
- Extremely aperiodic repeating events reveal distinct rupture characteristics
Authors: Inessa Vorobieva, Peter Shebalin, Clément Narteau
First Published: 8 July 2016, Vol: 43, Pages: 6869–6875, DOI: 10.1002/2016GL069636
- Earthquake size distribution depends on the rate of aseismic deformation
- Creep is responsible for a break of slope in the earthquake size distribution
- Faster creep causes a deficit of larger earthquakes
Authors: Yelebe Birhanu, Rebecca Bendick, Shimeles Fisseha, Elias Lewi, Michael Floyd, Robert King, Robert Reilinger
First Published: 4 July 2016, Vol: 43, Pages: 6844–6851, DOI: 10.1002/2016GL069890
- The Ethiopian Highlands extend
- African stretching is accommodated by multiple mechanisms
- The African rift deforms in the same way as other continental regions
Authors: T. J. Craig, E. Calais, L. Fleitout, L. Bollinger, O. Scotti
First Published: 4 July 2016, Vol: 43, Pages: 6826–6836, DOI: 10.1002/2016GL069359
- Compressional end‐glacial earthquakes in Fennoscandia occurred in a setting where the contemporaneous horizontal strain rate was extensional
- End‐glacial earthquakes therefore tapped into tectonically derived strain accumulated and stored over a long timescale
- Seismic hazard in intraplate settings is influenced by nontectonic transients and may be more broadly distributed than commonly thought
Authors: Michael A. Floyd, Richard J. Walters, John R. Elliott, Gareth J. Funning, Jerry L. Svarc, Jessica R. Murray, Andy J. Hooper, Yngvar Larsen, Petar Marinkovic, Roland Bürgmann, et al
First Published: 2 July 2016, Vol: 43, Pages: 6808–6816, DOI: 10.1002/2016GL069428
- Small‐scale spatial and temporal variability of modes of slip observed geodetically
- Afterslip is delimited by variations in lithology more than Coulomb stress changes
- Addition of postseismic contribution increases moment budget by 30%
June 2016
Authors: Christopher W. Johnson, Eoghan J. Totten, Roland Bürgmann
First Published: 24 June 2016, Vol: 43, Pages: 6196–6204, DOI: 10.1002/2016GL069546
- Depth‐dependent seismicity rates show deepening of earthquakes on annual cycle in the NW and SE injection fields
- Fluids migrate from the injection depth more than 3 km through reservoir over a 6 month period
- Field‐wide network of hydraulically conductive steeply dipping faults provides pathways a few kilometers below injection
Authors: K. Aderhold, R. E. Abercrombie
First Published: 20 June 2016, Vol: 43, Pages: 6119–6128, DOI: 10.1002/2016GL068802
- Slow spreading rate Atlantic transform fault slips in large (M~7) quasi‐repeating earthquakes
- Foreshocks, aftershocks, and unilateral rupture of 2015 earthquake are similar to 1974 earthquake
- Transform earthquakes start small near ridge with large slip asperities nearer transform center
Authors: Rajeeb Lochan Mishra, I. Singh, A. Pandey, P. S. Rao, H. K. Sahoo, R. Jayangondaperumal
First Published: 11 June 2016, Vol: 43, Pages: 5707–5715, DOI: 10.1002/2016GL068739
- We conclude that the 1255 medieval earthquake was a giant event with a 800 km rupture length
- We validate that the Himalayan continental subduction zone is capable of producing giant earthquakes approaching Mw 9.0
- Speculation of a major event in the eastern Himalaya
Authors: T. Reverso, D. Marsan, A. Helmstetter, B. Enescu
First Published: 4 June 2016, Vol: 43, Pages: 5671–5679, DOI: 10.1002/2016GL068524
- We study the relationship between changes in seismicity rate and aseismic slip for the Boso area
- We propose an objective measure of the seismicity rate directly associated with changes in slip rate
- We show an increase of the background seismicity explaining the shortening of the SSEs occurrence
May 2016
Authors: Prakash Kumar, G. Srijayanthi, M. Ravi Kumar
First Published: 18 May 2016, Vol: 43, Pages: 4899–4904, DOI: 10.1002/2016GL068590
- Subducting Indian ocean plate has been imaged beneath the Andaman‐Nicobar trench
- Evidence of tear in subducting Indian ocean plate using Ps and Spconversions
- The lithospheric thickness varies from ~40 to 70 km all along the Island from north to south
Authors: Yen‐Ling Chen, Shu‐Huei Hung, Juen‐Shi Jiang, Ling‐Yun Chiao
First Published: 28 May 2016, Vol: 43, Pages: 5017–5025, DOI: 10.1002/2016GL069020
- General dependence of the b value with the style of faulting and stress is first verified in the Taiwan orogen
- Regional b value variations correlate well with the crustal deformation and stress regimes manifested from the local tectonics
- The depth‐varying b value reveals the brittle‐plastic transition at ~15–20 km and a weak middle crust under Taiwan
Authors: Jun Muto, Bunichiro Shibazaki, Takeshi Iinuma, Yoshihiro Ito, Yusaku Ohta, Satoshi Miura, Yoshihiko Nakai
First Published: 27 May 2016, Vol: 43, Pages: 4971–4978, DOI: 10.1002/2016GL068113
- Heterogeneous rheology controlled postseismic deformation of the Tohoku‐Oki earthquake
- Dense geodetic observation is essential to reveal small‐scale rheological heterogeneity
- Inverted afterslip and viscoelastic relaxation in a heterogeneous rheology model explain the observations well, even on small scales
Authors: Phoebe M. R. DeVries, Brendan J. Meade
First Published: 4 May 2016, Vol: 43, Pages: 4205–4214, DOI: 10.1002/2016GL068375.
- A framework for kinematically consistent viscoelastic stress through the earthquake cycle is presented
- In the models, earthquake‐generated stresses are zero at the end of the earthquake cycle and may reach an interseismic maximum
- Based on the timing of stress maxima, the mean time of viscoelastically triggered earthquakes may be ~5–35% through the earthquake cycle
Authors: L. Anderlini, E. Serpelloni, M. E. Belardinelli
First Published: 7 May 2016, Vol: 43, Pages: 4321–4329, DOI: 10.1002/2016GL068604
- First geodetic image of heterogeneous interseismic coupling on a continental LANF
- The locked portion of the Alto Tiberina LANF can potentially be the locus of M > 6 earthquakes
- Stress accumulated by long‐term creep on the ATF can be released by failure of hanging wall splay faults
Authors: Melodie E. French, Wenlu Zhu, Jeremy Banker
First Published: 7 May 2016, Vol: 43, Pages: 4330–4339, DOI:10.1002/2016GL068893
- Fluid pressurization is less effective at inducing accelerated slip events than mechanical reduction in normal stress
- Fluid pressurization enhances slip events by increasing the rate at which effective normal stress decreases
- During slip events, slip rate and shear stress drop are correlated with fluid pressurization rate and not the magnitude of fluid pressure
March 2016
Authors: Wenyuan Fan, Peter M. Shearer
First Published: 8 March 2016; Vol: 43; Pages: 1934–1942; DOI: 10.1002/2016GL067785.
- The Mw 7.2 earthquake ruptured unilaterally to the northwest lasting 40 s
- Early aftershocks were triggered within 2 min occurring near the subduction interface
- A seaward‐intraplate strike‐slip earthquake triggered landward‐intraplate earthquakes
Ongoing deformation of Antarctica following recent Great Earthquakes
Authors: Matt A. King, Alvaro Santamaría‐Gómez
First Published: 6 March 2016; Vol: 43; Pages: 1918–1927; DOI: 10.1002/2016GL067773.
- Geodetic time series show Antarctica deforming since the 1998 Great Antarctic Plate Earthquake
- Modeling of postseismic deformation suggests that most of Antarctica could still be deforming
- Geodetically derived estimates of plate rotation and glacial isostatic adjustment are affected
February 2016
Authors: Amanda M. Thomas, Gregory C. Beroza, David R. Shelly
First Published: 17 February 2016; Vol: 43; Pages: 1464–1471; DOI: 10.1002/2015GL067173.
- LFEs have slow rupture and slip velocities
- LFEs are low stress drop events (~10 kPa)
- Seismic and aseismic components of slow slip can be explained by the same mechanism
Authors: Ping He, Qi Wang, Kaihua Ding, Min Wang, Xuejun Qiao, Jie Li, Yangmao Wen, Caijun Xu, Shaomin Yang, Rong Zou
First Published: 20 February 2016; Vol: 43; Pages: 1511–1519; DOI: 10.1002/2015GL067140.
- Coseismic displacements reveal blind thrusting along a ramp beneath the western Kunlun Shan
- The rupture is characterized by two asperities at different depths separated by a barrier
- The earthquake highlights migration of the deformation front northward as the Tarim Basin underthrusts Tibet
Authors: P. A. Johnson, J. Carmeliet, H. M. Savage, M. Scuderi, B. M. Carpenter, R. A. Guyer, E. G. Daub, C. Marone
First Published: 26 February 2016; Vol: 43; Pages: 1559–1565; DOI: 10.1002/2015GL067056.
- In the lab instantaneous dynamic triggering requires fault gouge and dynamic strains exceeding 10−6
- Following triggering there is a recovery process that takes place over multiple stick‐slip cycles
- We posit that similar processes may take place in situ
Authors: Diego Melgar, Wenyuan Fan, Sebastian Riquelme, Jianghui Geng, Cunren Liang, Mauricio Fuentes, Gabriel Vargas, Richard M. Allen, Peter M. Shearer, Eric J. Fielding
First Published: 4 February 2016; Vol: 43; Pages: 961–966; DOI: 10.1002/2015GL067369.
- Slip is segmented along dip
- Large shallow slip efficiently generated a tsunami
- Shallow slip deficits potentially accumulate at a different rate
Authors: Ryota Takagi, Kazushige Obara, Takuto Maeda
First Published: 4 February 2016; Vol: 43; Pages: 1066–1074; DOI: 10.1002/2015GL066987.
- New family of slow slip events detected in gap between tremor and locked zones
- Slow slip events in the gap occur east of the Bungo channel after 2003 and 2010
- Downdip tremor activity correlates spatiotemporally with the slow slip events
Authors: T. H. W. Goebel, S. M. Hosseini, F. Cappa, E. Hauksson, J. P. Ampuero, F. Aminzadeh, J. B. Saleeby
First Published: 4 February 2016; Vol: 43; Pages: 1092–1099; DOI: 10.1002/2015GL066948.
- Anomalous swarm activity associated with White Wolf fault
- Induced seismicity likely caused by localized pressure increase along a seismically active fault
- Induced seismicity may be masked by natural earthquake activity in California
January 2016
Authors: F. Tilmann, Y. Zhang, M. Moreno, J. Saul, F. Eckelmann, M. Palo, Z. Deng, A. Babeyko, K. Chen, J. C. Baez, et al
First Published: 19 January 2016; Vol: 43; Pages: 574–583; DOI: 10.1002/2015GL066963
- We determine a comprehensive rupture model for the 2015 Illapel earthquake
- Divergence between finite fault and backprojection source time functions indicates shallow slip
- The 1943 Illapel earthquake rupture was probably similar in the deeper parts but lacks shallow slip
Authors: Tao Geng, Xin Xie, Rongxin Fang, Xing Su, Qile Zhao, Gang Liu, Heng Li, Chuang Shi, Jingnan Liu
First Published: 14 January 2016; Vol: 43; Pages: 161–167; DOI: 10.1002/2015GL067044
- First work to use 1 Hz BDS observations to measure earthquake ground motions
- Velocity estimation has an additional 20% improvement with GPS + BDS solutions
- Displacements derived with accuracy better than 5 cm for stations experiencing 1–2 m ground motions
Authors: Kaj M. Johnson, Andreas Mavrommatis, Paul Segall
First Published: 9 January 2016; Vol: 43; Pages: 135–143; DOI: 10.1002/2015GL066707
- Megathrust modeled as either locked or slipping with rate‐strengthening friction
- Coseismic slip and afterslip overlap on the subduction interface
- Simple stationary frictional asperity model is nullified
December 2015
Authors: Louisa L. H. Tsang, Aron J. Meltzner, Emma M. Hill, Jeffrey T. Freymueller, Kerry Sieh
First Published: 19 December 2015; Vol: 42; Pages: 10,585–10,594; DOI: 10.1002/2015GL066366
- An ∼1100 year paleogeodetic record reveals time‐varying interseismic deformation rates
- Modeling suggests that changes in fault coupling over decades to centuries can explain these rates
- GPS‐derived coupling maps represent only a snapshot of fault conditions that can change with time
Authors: Lonn Brown, Kelin Wang, Tianhaozhe Sun
First Published: 23 December 2015; Vol: 42; Pages: 10,595–10,600; DOI: 10.1002/2015GL066361
- Average static stress drop in the Mw 9 Tohoku‐oki earthquake is not very large
- Stress drop distribution is heterogeneous with very high values in local areas
- Coexistence of large stress drop and increase makes average value low
Authors: T. Hajati, C. Langenbruch, S. A. Shapiro
First Published: 23 December 2015; Vol: 42; Pages: 10,601–10,606; DOI: 10.1002/2015GL066652
- Statistical model to compute the occurrence probability of hydraulic‐fracturing‐induced seismicity
- Seismicity is triggered by relaxation of stress and pore pressure perturbation by injection
- No aftershocks have to be included in statistical models of hydro‐fracturing induced seismicity
Authors: Bhaskar Kundu, Naresh Krishna Vissa, V. K. Gahalaut
First Published: 23 December 2015; Vol: 42; Pages: 10,607–10,613; DOI: 10.1002/2015GL066616;
- Groundwater withdrawal leading to crustal unloading in the Indo‐Gangetic plains
- It enhances the Coulomb stress on the locked zone of MHT
- The 2015 Gorkha, Nepal earthquake is influenced by anthropogenic unloading
Authors: Newdeskarl Saint Fleur, Nathalie Feuillet, Raphaël Grandin, Eric Jacques, Jennifer Weil‐Accardo, Yann Klinger
First Published: 12 December 2015; Vol: 42; Pages: 10,273–10,281; DOI: 10.1002/2015GL065505;
- A new seismotectonic study in Haiti and identification of active faults in Port‐au‐Prince
- A new faulting model for the Haiti M7 2010 earthquake
- A reappraisal of the seismic hazard in southern Haiti and Port‐au‐Prince after the earthquake
November 2015
Authors: Andreas P. Mavrommatis, Paul Segall, Naoki Uchida, Kaj M. Johnson
First Published: 19 November 2015; Vol: 42; Pages: 9717–9725; DOI: 10.1002/2015GL066069
- Independent confirmation of long‐term transient slip event preceding the Mw 9 Tohoku‐oki earthquake
- Repeating earthquakes during 1996–2011 occurred at an accelerated rate near the Mw 9 source area
- Consistent estimates of slip acceleration are inferred from independent geodetic and seismicity data