	DOUGLAS DREGER Assistant Professor of Geophysics
	Office: 283 McCone Hall Telephone: (510) 643-1719 Fax: (510) 643-9980 E-mail: dreger@seismo.berkeley.edu To Department home page To Seismo Lab home page

Research Interests

Use of waveform data to investigate seismic source, wave propagation, and Earth structure problems including geophysical inverse problems.

Additionally, research is conducted to develop robust automated procedures to analyze earthquakes as they occur and to report strong shaking levels on a local and regional scale.

Current research is focussed on nuclear event discrimination using regional distance moment tensors, investigating anomalous seismic radiation of Mammoth Lakes, CA, events, the development of a regional distance methodology to rapidly determine near-source strong ground motion shaking levels, and investigation of 3D crustal structure affects on ground motions in the greater San Francisco bay area.

Specific Research Projects

Three-dimensional wave propagation in the Greater SF Bay Area

Berkeley Seismological Laboratory Regional Moment Tensor Page

Historic Earthquakes (1952 Kern County Sequence)

Earthquake Source Processes

Regional Distance Shakemaps (PGE-PEER Final Report) and (slide show)

Comprehensive nuclear Test Ban Treaty Research

Millennium Project Progress Report

October 16, 1999 Hector Mine Earthquake (Mw7.1)

Academic Background

1992- Ph.D. Geophysics, California Institute of Technology
1989- M.S. geophysics, California Institute of Technology
1987- Geophysics, University of California, Riverside

Ph.D. and Master's Students

Wu Cheng Chi (Ph.D. candidate)
David Dolenc (current)
Michael Antolik (Ph.D. 1996: Research Associate, Harvard University)
Janine Weber-Band (Ph.D. 1998)
Peggy Johnson (Ph.D. 1997: Mathematics and Science Instructor, San Leandro Unified School District)
Christiane Stidham (Ph.D. 1999: Post-doc, Harvard University)
Laurie Baise (MS 2001: Assistant Professor, Tufts University)

Courses Offered

ESP39 - Geologic Influences on California Society

EPS50 - Introductory Geology

EPS121 - Seismology, Next offered Spring 2001

EPS130 - Strong Motion Seismology

EPS218 - Methods of Earthquake Source Modeling

GP207 - Laboratory in Observational Seismology, Next offered Spring 2001

Recent Publications

Chi, W. C., D. Dreger and A. Kaverina (2001). Finite source modeling of the 1999 Taiwan (Chi-Chi) earthquake derived from a dense strong motion network, in press BSSA special issue.

Panning, M., D. Dreger and H. Tkalcic (2001). Near-source structure and isotropic moment tensors: a case study of the Long Valley Caldera, in press Geophys. Res. Lett..

Baise, L. G., S. D. Glaser, and D. Dreger (2001). Site response at Treasure Island and Yerba Buena Island, San Francisco Bay, California, submitted to Soil Dynamics and Earthquake Engineering.

Uhrhammer, R. A., D. Dreger and B. Romanowicz (2001). Best practice in earthquake location using broadband three-component seismic waveform data, Pure Appl. Geophys., 158, 259-276.

Kaverina, A., D. Dreger and E. Price (2000). The combined inversion of seismic and geodetic data for the source process of the Hector Mine October 16, 1999 earthquake (Mw7.2), submitted to BSSA Special Issue.

Kaverina, A., D. Dreger, and E. Price (2000). Source process of the October 16, 1999 Hector Mine Earthquake (Mw7.2) from the inversion of broadband regional data, submitted to JGR.

Dreger, D. S., H. Tkalcic, and M. Johnston (2000). Dilational processes accompanying earthquakes in the Long Valley Caldera, Science, 288, 122-125.

Dreger, D., and A. Kaverina (2000). Seismic remote sensing for the earthquake source process and near-source strong shaking: A case study of the October 16, 1999 Hector Mine earthquake, Geophys. Res. Lett., 27, 1941-1944.

Parsons, T., and D. S. Dreger (2000). Static-stress inpact of the 1992 Landers earthquake sequence on nucleation and slip at the site of the 1999 M=7.1 Hector Mine earthquake, southern California, Geophys. Res. Lett., 27, 1949-1952.

Antolik, M., A. Kaverina, and D. Dreger (2000). Compound rupture of the great 1998 Antarctic Plate earthquake, J. Geophys. Res., V105, 23,825-23,838.

Fukuyama, E., and D. Dreger (2000). Performance test of an automated moment tensor determination system for the future "Tokai" earthquake, Earth Planets Space, 52, 383-392.

Antolik, M., D.S. Dreger, and B. Romanowicz (1999). Rupture processes of large deep-focus earthquakes from inversion of moment rate functions, J. Geophys. Res., 104, 863-894.

Stidham, C., M. Antolik, D. Dreger, S. Larsen, and B. Romanowicz (1999). Three-Dimensional Structure Influences on the Strong Motion Wavefield of the 1989 Loma Prieta Earthquake, Bull. Seism. Soc. Am., 89, 1184-1202

Uhrhammer, R., L. Gee, M. Murray, D. Dreger, and B. Romanowicz (1999). The Mw5.1 San Juan Bautista Earthquake of 12 August, 1998, Seism. Res. Let., 70, 10-18.

Dreger, D. and B. Woods (1998). Use of Regional Distance Seismic Moment Tensors to Discriminate Nuclear Explosions?, under revision

Kaverina, A., D. Dreger, and M. Antolik (1998). Source process of the 21 April, 1997, Santa Cruz Island Earthquake (Mw 7.8), Geophys. Res. Lett., 25, 4027-4030.

Dreger, D. and B. Savage (1998). Aftershocks of the 1952 Kern County, California, Earthquake Sequence, Bull. Seism. Soc. Am., 89, 1094-1108.

Fukuyama, E., M. Ishida, D. Dreger, and H. Kawai (1998), Automated Seismic Moment Tensor Determination by Using On-line Broadband Seismic Waveforms, Zishin, 51, 149-156 (in Japanese with English abstract).

Dreger, D., R. Uhrhammer, M. Pasyanos, J. Franck, and B. Romanowicz (1998), Regional and Far-Regional Earthquake Locations and Source Parameters using Sparse Broadband Networks: A Test on the Ridgecrest Sequence, Bull. Seism. Soc. Am., 88, 1353-1362

Dreger, D. (1997), The Large Aftershocks of the Northridge Earthquake and their Relationship to Mainshock Slip and Fault Zone Complexity, Bull. Seism. Soc. Am., 87, 1259-1266

Antolik, M., D. Dreger, and B. Romanowicz (1996), Finite Fault Source Study of the Great 1994 Deep Bolivia Earthquake, Geophys Res. Lett., 23, 1589-1592.

Gee, L. S., D. S. Neuhauser, D. S. Dreger, M. Pasyanos, R. A. Uhrhammer, and B. Romanowicz (1996), Real-Time Seismology at UC Berkeley: The Rapid Earthquake Data Integration Project, Bull. Seism. Soc. Am., 86, 936-945.

Pasyanos, M. E., D. S. Dreger, and B. Romanowicz (1996), Towards Real-Time Determination of Regional Moment Tensors, Bull. Seism. Soc. Am., 86, 1255-1269

Dreger, D., J. Ritsema, and M. Pasyanos (1995), Broadband Analysis of the 21 September, 1993, Klamath Falls Earthquake Sequence, Geophys. Res. Lett., 22, 997-1000.

Hough, S. E., D. S. Dreger (1994), Source Parameters of the 4/22/92 M6.1 Joshua Tree, California Earthquake and its Aftershocks: Empirical Green's Function Analysis of GEOS and TERRAscope Data, Bull. Seism. Soc. Am., 85, 1576-1590.

Dreger, D. (1994), Empirical Green's Function Study of the January 17, 1994 Northridge, California Earthquake, Geophys. Res. Lett., 21, 2633-2636.

Dreger, D. S. (1994), Investigation of the Rupture Process of the 28 June 1992 Landers Earthquake Utilizing TERRAscope, Bull. Seism. Soc. Am., 84, 713-724.

Saikia, C. K., D. S. Dreger, and D. V. Helmberger (1994), Modeling of Energy Amplification Recorded within Greater Los Angeles Using Irregular Structure, Bull. Seism. Soc. Am., 84, 47-61.

Dreger, D. S., and D. V. Helmberger (1993), Determination of Source Parameters at Regional Distances with Single Station or Sparse Network Data, Journ. Geophys. Res., 98, 8107-8125.

Romanowicz, B. D. Dreger, M . Pasyanos, and R. Urhammer (1993). Monitoring of Strain Release in Central and Northern California Using Broadband Data, Geophys. Res. Let., 20, 1643-1646.

Helmberger, D., D. Dreger, R. Stead, and H. Kanamori (1993). Impact of Broadband Seismology on the Understanding of Strong Motions, Bull. Seism. Soc. Am., 83, 830-850.

Somerville, P., N. Smith, and D. Dreger (1993), Influence of Critical Moho Reflections on Strong Ground Motion Attenuation in California, Data Utilization Report CSMIP/93-01, 84 pp.

Dreger, D. S., and D. V. Helmberger (1992). Investigation of Two-Dimensional Wave Propagation in the Kanto Plain, CUREe-Kajima Research Project, California Institute of Technology, UCB EERC 340 c87.

Kanamori, H., H. Thio, D. Dreger, E. Hauksson, T. Heaton (1992). Initial Investigation of the Landers, California Earthquake of 28 June 1992 Using TERRAscope, Geophys. Res. Lett., 19 2267-2270.

Helmberger, D. V., L. S. Zhao, D. Dreger and V. LeFevre (1992). Exploration of the lower lithosphere; northeastern United States, Phys. Earth Plan. Int., 70 22-38.

Helmberger, D. V., R. Stead, P. Ho-Liu, and D. Dreger (1992). Broadband Modeling of Regional Seismograms; Imperial Valley to Pasadena, Geophys. J. Int., 110 42-54.

Dreger, D. S., and D. V. Helmberger (1991). Source Parameters of the Sierra Madre Earthquake from Regional and Local Body Waves, Geophys. Res. Let., 18 2015-2018.

Dreger, D. S., and D. V. Helmberger (1991). Complex Faulting Deduced from Broadband Modeling of the 28 February 1990 Upland Earthquake (ML=5.2), Bull. Seism. Soc. Am., 81 1129-1144.

Dreger, D. S., and D. V. Helmberger (1990). Broadband Modeling of Local Earthquakes, Bull. Seism. Soc. Am., 80 1162-1179.