Taka'aki Taira
Associate Research Seismologist
Ph.D., Hokkaido University, Japan, 2004

Berkeley Seismological Laboratory
University of California, Berkeley
219 McCone Hall
Berkeley CA 94720-4760

Phone: (510) 642-8504
Fax: (510) 643-5811
Email: taira@berkeley.edu


Curriculum Vitae (pdf|html)  |  Publications  |  Grants

Research Interests
Observational and Earthquake seismology; transient stress changes at seismogenic depth; subsurface hydrothermal fluid migration; source mechanism of fluid-induced earthquakes; seismic imaging of crustal structure; developing seismic array methodologies; seismic wave propagation; modeling of conduit flow dynamics.

Monitoring of Relative Velocity Change Following the 2014 Mw 6.0 South Napa Earthquake

Northern California Earthquake Monitoring
Operation and maintenance of seismic networks (BDSN, TremorScope, HRSN, NHFN, mPBO, NCSN, SAFOD); seismic instrument response; seismic moment tensor analysis; seismic noise analysis; ShakeMap.


  1. Taira, T., R. Bürgmann, R. M. Nadeau, and D. S. Dreger (2014), Variability of fault slip behavior along the San Andreas Fault in the San Juan Bautista region, J. Geophys. Res., doi:10.1002/2014JB011427. (Link to article)
    ● All waveform data used in this study can be available from NCEDC and SCEDC.

  2. Taira, T., Z. Zheng, and B. Romanowicz (2014), On the systematic long period noise reduction on ocean floor broadband seismic sensors collocated with differential pressure gauges, Bull. Seis. Soc. Am., 104, 247-259. (Link to article)
    ● All waveform data used in this study can be available from NCEDC.

  3. Shelly, D., D. Hill, F. Massin, J. Farrell, R. B. Smith, and T. Taira (2013), A fluid-driven earthquake swarm on the margin of the Yellowstone caldera, J. Geophys. Res., 118, 4872-4886, doi:10.1002/jgrb.50362. (Link to article).

  4. Shirzaei, M., R. Bürgmann, T. Taira (2013), Implications of recent asperity failures and aseismic creep for time-dependent earthquake hazard on the Hayward fault, Earth and Planetary Science Letters, 371-372, 59-66, doi:10.1016/j.epsl.2013.1004.1024. (Link to article).
    ● All waveform data used in this study can be available from NCEDC.

  5. Farrell, J., R. B. Smith, T. Taira, W.-L. Chang, and C. M. Puskas (2010), Dynamics and rapid migration of the energetic 2008-2009 Yellowstone Lake earthquake swarm, Geophys. Res. Lett., 37, L19305, doi:10.1029/2010GL044605. (Link to article).

  6. Taira, T., R. B. Smith, and W.-L. Chang (2010), Seismic evidence for dilatational source deformations accompanying the 2004-2008 Yellowstone accelerated uplift episode, J. Geophys. Res., 115, B02301, doi:10.1029/2008JB006281. (Link to article)
    ● All waveform data used in this study can be available from IRIS.

  7. Taira, T., P. G. Silver, F. Niu, and R. M. Nadeau (2009), Remote triggering of fault-strength changes on the San Andreas fault at Parkfield, Nature, 461, 636-639, doi:10.1038/nature08395. (Link to article)
    ● All waveform data used in this study can be available from NCEDC.

  8. Taira, T., P. G. Silver, F. Niu, and R. M. Nadeau (2008), Detecting seismogenic stress evolution and constraining fault zone rheology in the San Andreas Fault following the 2004 Parkfield earthquake, J. Geophys. Res., 113, B03303, doi:10.1029/2007JB005151. (Download pdf reprint)
    ● All waveform data used in this study can be available from NCEDC.

  9. Taira, T., K. Yomogida, Y. Kuwahara, K. Imanishi, and H. Ito (2007), Imaging of crustal heterogeneous structures using a slowness-weighted back-projection with effects of scattering modes II: Application to the Nagamachi-Rifu fault, Japan, area, J. Geophys. Res., 112, B06312, doi:10.1029/2006JB004382. (Download pdf reprint)

  10. Taira, T., and K. Yomogida (2007), Imaging of crustal heterogeneous structures using a slowness-weighted back-projection with effects of scattering modes I: Theory, J. Geophys. Res., 112, B06311, doi:10.1029/2006JB004381. (Download pdf reprint)

  11. Onizawa, S., H. Oshima, H. Aoyama, H. Y. Mori, T. Maekawa, A. Suzuki, T. Tsutsui, N. Matsuwo, J. Oikawa, T. Ohminato, K. Yamamoto, T. Mori, T. Taira, H. Miyamachi, and H. Okada (2007), P-wave velocity structure of Usu volcano: Implication of structural controls on magma movements and eruption locations, J. Volcano. Geotherm. Res., 160, 175-194, doi:10.1016/j.jvolgeores.2006.10.005. (Link to article)

  12. Iwasaki, T., K. Adachi, T. Moriya, H. Miyamachi, T. Matsushima, K. Miyashita, T. Takeda, T. Taira, T. Yamada, and K. Ohtake (2004), Upper and middle crustal deformation of an arc–arc collision across Hokkaido, Japan, inferred from seismic refraction/wide-angle reflection experiments, Tectonophysics, 388, 59-73, doi:10.1016/j.tecto.2004.03.025. (Link to article)

  13. Taira, T., and K. Yomogida (2004), Imaging of three-dimensional small-scale heterogeneities in the Hidaka, Japan region: Coda spectral analysis, Geophys. J. Int., 158(3), 998-1008, doi:10.1111/j.1365-246X.2004.02333.x. (Download pdf reprint)

  14. Taira, T., and K. Yomogida (2003), Characteristics of small-scale heterogeneities in the Hidaka, Japan, region estimated by coda envelope level, Bull. Seis. Soc. Am., 93, 1531-1541. (Download pdf reprint)

  15. Taira, T., T. Moriya, H. Miyamachi, N. Wada, S. Hirano, K. Otsuka, W. Matsubara, and Y. Maruyama (2002), Seismic refraction experiment in the northeastern part of Hokkaido, Japan (in Japanese with English abstract), Bull. Earthq. Res. Inst. Univ. Tokyo, 77, 225-230. (Download pdf reprint)

  16. Taira, T., and K. Tsumura (2001), The identification and removal of artificial events from the JMA and Tohoku University earthquake catalogs (in Japanese), Journal of the Seismological Society of Japan (Zisin), 53, 255-258. (Download pdf reprint)

Awards & Honors  

  • 2013 Best Young Scientist Poster Award, International Continental Scientific Drilling Program

  • 2013 Visiting Research Fellowship, Earthquake Research Institute, University of Tokyo

  • 2011 Young Scientist Award, the Seismological Society of Japan

  • 2004 C.V. Starr Fellowship, Carnegie Institution for Science


  1. Collaborative Research: Imaging Stress Transients and Fault Zone Processes with Continuous Cross-Well Active Source Seismic Measurements at SAFOD, NSF EarthScope, $101,789, 09/01/2014-08/31/2017 (PIs: F. Niu at Rice University, T. Daley at LBNL, T. Taira at UC Berkeley).

  2. Spatiotemporal Variability of Slip Budget in Subduction of the Cocos Plate Beneath Central Mexico Inferred from Repeating Earthquake Activity: Implication for Time Dependent Earthquake Hazard Assessment, UC MEXUS-CONACYT Grant, $17,550, 07/01/2014-12/31/2016 (PIs: T. Taira at UC Berkeley and L. A. Dominguez Ramirez, V. Hjorleifsdottir at UNAM).

  3. Time-Lapse Monitoring of Stress-Induced Changes in the Seismogenic Crust, France Berkeley Fund, $10,000, 08/01/2014-07/31/2015 (PIs: T. Taira at UC Berkeley and F. Brenguier at ISTerre Grenoble).

  4. Finite-Source Modeling and Stress Drop Estimate of Anza Microearthquakes: Implication for Fault Strength and Earthquake Nucleation, SCEC, 13030, $18,000, 02/01/2013-01/31/2015 (PI: T. Taira).

  5. Transient Slip on the Hayward Fault from SBAS-InSAR, GPS and Seismicity Data, USGS, G12AP20096, $64,487, 06/01/2012-05/31/2013 (PI: I. A. Johanson, Co-PIs: R. Bürgmann and T. Taira).

  6. Source Characterization of Mendocino Offshore Earthquakes for Improvements in Monitoring Active Deformation and Estimates of Earthquake Potential in the Mendocino Triple Junction Region, USGS, G11AP20168, $48,480, 07/01/2011-06/30/2012 (PI: T. Taira, Co-PI: R. M. Nadeau).

  7. Time-Lapse Monitoring for Detection of Transient Stress Changes in Geysers Geothermal Field, NSF, EAR-1053211, $217,399, 07/01/2011-06/30/2013 (PI: T. Taira, Co-PIs: R. M. Nadeau, D. S. Dreger, and I. A. Johanson).

  8. TremorScope, Gordon and Betty Moore Foundation.

  9. Faulting Process from Top to Bottom Along the San Andreas Fault in the San Juan Bautista Region, NSF, EAR-0951430, $381,752, 07/15/2010-06/30/2013 (PI: R. Bürgmann, Co-PIs: R. M. Nadeau, I. A. Johanson, P. Audet, and T. Taira).

  10. An Investigation into Time-Dependent Fault Zone Properties at Seismogenic Depth on the San Andreas Fault near Parkfield, NSF, EAR-0910322, $210,474, 08/15/2009-07/31/2011 (PI: T. Taira, Co-PIs: R. M. Nadeau and D. S. Dreger).

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Last modified: 1 November 2014