Helmberger, Donald V.
Jia, Zhe and Zhan, Zhongwen, et el. (2022) Bayesian differential moment tensor inversion: theory and application to the North Korea nuclear tests ; Geophysical Journal International; Vol. 229; No. 3; 2034-2046; 10.1093/gji/ggac053
Lai, Voon Hui and Helmberger, Don V., et el. (2022) Strong ULVZ and Slab Interaction at the Northeastern Edge of the Pacific LLSVP Favors Plume Generation ; Geochemistry, Geophysics, Geosystems; Vol. 23; No. 2; Art. No. e2021GC010020; 10.1029/2021gc010020
Lai, Voon Hui and Graves, Robert W., et el. (2020) Shallow Basin Structure and Attenuation Are Key to Predicting Long Shaking Duration in Los Angeles Basin ; Journal of Geophysical Research. Solid Earth; Vol. 125; No. 10; Art. No. e2020JB019663; 10.1029/2020jb019663
Yu, Chunquan and Hauksson, Egill, et el. (2019) Depth Determination of the 2010 El Mayor‐Cucapah Earthquake Sequence (M≥4.0) ; Journal of Geophysical Research. Solid Earth; Vol. 124; No. 7; 6801-6814; 10.1029/2018jb016982
Yu, Chunquan and Zhan, Zhongwen, et el. (2019) Determining Moho Depth beneath Sedimentary Basins Using Regional Pn Multiples ; Bulletin of the Seismological Society of America; Vol. 109; No. 3; 1171-1179; 10.1785/0120180325
Sun, D. and Helmberger, D., et el. (2019) Slab Control on the Northeastern Edge of the Mid-Pacific LLSVP near Hawaii ; Geophysical Research Letters; Vol. 46; No. 6; 3142-3152; 10.1029/2018GL081130
Wei, Shengji and Chen, Meng, et el. (2018) The 2015 Gorkha (Nepal) earthquake sequence: I. Source modeling and deterministic 3D ground shaking ; Tectonophysics; Vol. 722; 447-461; 10.1016/j.tecto.2017.11.024
Ko, Justin Yen-Ting and Helmberger, Don V., et el. (2017) Lower-mantle Substructure Embedded in the Farallon Plate: The Hess Conjugate ; Geophysical Research Letters; Vol. 44; No. 20; 10216-10225; 10.1002/2017GL075032
Chu, Risheng and Ko, Justin Yen-Ting, et el. (2017) Lithospheric radial anisotropy beneath the Gulf of Mexico ; Earth and Planetary Science Letters; Vol. 466; 43-52; 10.1016/j.epsl.2017.02.040
Lai, Voon Hui and Graves, Robert W., et el. (2017) Evidence for strong lateral seismic velocity variation in the lower crust and upper mantle beneath the California margin ; Earth and Planetary Science Letters; Vol. 463; 202-211; 10.1016/j.epsl.2017.02.002
Sun, Daoyuan and Gurnis, Michael, et el. (2017) A dipping, thick segment of the Farallon Slab beneath Central US ; Journal of Geophysical Research. Solid Earth; Vol. 122; No. 4; 2911-2928; 10.1002/2016JB013915
Lui, Semechah K. Y. and Helmberger, Don, et el. (2016) Rapid Assessment of Earthquake Source Characteristics ; Bulletin of the Seismological Society of America; Vol. 106; No. 6; 2490-2499; 10.1785/0120160112
Sun, Daoyuan and Helmberger, Don, et el. (2016) Major disruption of D″ beneath Alaska ; Journal of Geophysical Research: Solid Earth; Vol. 121; No. 5; 3534-3556; 10.1002/2015JB012534
Huang, Yihe and Ampuero, Jean-Paul, et el. (2016) The potential for supershear earthquakes in damaged fault zones – theory and observations ; Earth and Planetary Science Letters; Vol. 433; 109-115; 10.1016/j.epsl.2015.10.046
Lui, Semechah K. Y. and Helmberger, Don, et el. (2015) Interrogation of the Megathrust Zone in the Tohoku-Oki Seismic Region by Waveform Complexity: Intraslab Earthquake Rupture and Reactivation of Subducted Normal Faults ; Pure and Applied Geophysics; Vol. 172; No. 12; 3425-3437; 10.1007/s00024-015-1042-9
Wei, Shengji and Avouac, Jean-Philippe, et el. (2015) The 2012 Brawley swarm triggered by injection-induced aseismic slip ; Earth and Planetary Science Letters; Vol. 422; 115-125; 10.1016/j.epsl.2015.03.054
Wei, Shengji and Barbot, Sylvain, et el. (2015) The 2014 M_w 6.1 South Napa Earthquake: A Unilateral Rupture with Shallow Asperity and Rapid Afterslip ; Seismological Research Letters; Vol. 86; No. 2A; 344-354; 10.1785/0220140249
Chu, Risheng and Helmberger, Don, et el. (2014) Upper mantle surprises derived from the recent Virginia earthquake waveform data ; Earth and Planetary Science Letters; Vol. 402; 167-175; 10.1016/j.epsl.2012.10.023
Li, Dunzhu and Sun, Daoyuan, et el. (2014) Notes on the variability of reflected inner core phases ; Earthquake Science; Vol. 27; No. 4; 441-468; 10.1007/s11589-014-0093-9
Zhan, Zhongwen and Helmberger, Donald V., et el. (2014) Supershear rupture in a M_w 6.7 aftershock of the 2013 Sea of Okhotsk earthquake ; Science; Vol. 345; No. 6193; 204-207; 10.1126/science.1252717
Zhan, Zhongwen and Helmberger, Donald V., et el. (2014) Imaging subducted slab structure beneath the Sea of Okhotsk with teleseismic waveforms ; Physics of the Earth and Planetary Interiors; Vol. 232; 30-35; 10.1016/j.pepi.2014.03.008
Chu, Risheng and Ni, Sidao, et el. (2014) Inversion of Source Parameters for Moderate Earthquakes Using Short-Period Teleseismic P Waves ; Pure and Applied Geophysics; Vol. 171; No. 7; 1329-1341; 10.1007/s00024-013-0719-1
Li, Dunzhu and Helmberger, Don, et el. (2014) Global synthetic seismograms using a 2-D finite-difference method ; Geophysical Journal International; Vol. 197; No. 2; 1166-1183; 10.1093/gji/ggu050
Avouac, Jean-Philippe and Ayoub, François, et el. (2014) The 2013, Mw 7.7 Balochistan earthquake, energetic strike-slip reactivation of a thrust fault ; Earth and Planetary Science Letters; Vol. 391; 128-134; 10.1016/j.epsl.2014.01.036
Chu, Risheng and Helmberger, Don (2014) Lithospheric waveguide beneath the Midwestern United States; massive low-velocity zone in the lower crust ; Geochemistry, Geophysics, Geosystems; Vol. 15; No. 4; 1348-1362; 10.1002/2013GC004914
Huang, Yihe and Ampuero, Jean-Paul, et el. (2014) Earthquake ruptures modulated by waves in damaged fault zones ; Journal of Geophysical Research. Solid Earth; Vol. 119; No. 4; 3133-3154; 10.1002/2013JB010724
Zhan, Zhongwen and Tsai, Victor C., et el. (2014) Ambient noise correlation on the Amery Ice Shelf, East Antarctica ; Geophysical Journal International; Vol. 196; No. 3; 1796-1802; 10.1093/gji/ggt488
Zhan, Zhongwen and Kanamori, Hiroo, et el. (2014) Rupture complexity of the 1994 Bolivia and 2013 Sea of Okhotsk deep earthquakes ; Earth and Planetary Science Letters; Vol. 385; 89-96; 10.1016/j.epsl.2013.10.028
Chu, Risheng and Leng, Wei, et el. (2013) Hidden hotspot track beneath the eastern United States ; Nature Geoscience; Vol. 6; No. 11; 963-966; 10.1038/NGEO1949
Wei, Shengji and Helmberger, Don, et el. (2013) Rupture complexity of the M_w 8.3 Sea of Okhotsk Earthquake: Rapid triggering of complementary earthquakes? ; Geophysical Research Letters; Vol. 40; No. 19; 5034-5039; 10.1002/grl.50977
Wei, Shengji and Helmberger, Don, et el. (2013) Modeling the 2012 Wharton basin earthquakes off-Sumatra: Complete lithospheric failure ; Journal of Geophysical Research. Solid Earth; Vol. 118; No. 7; 3592-3609; 10.1002/jgrb.50267
Chu, Risheng and Helmberger, Don V. (2013) Source Parameters of the Shallow 2012 Brawley Earthquake, Imperial Valley ; Bulletin of the Seismological Society of America; Vol. 103; No. 2A; 1141-1147; 10.1785/0120120324
Wei, Shengji and Helmberger, Don, et el. (2013) Complementary slip distributions of the largest earthquakes in the 2012 Brawley swarm, Imperial Valley, California ; Geophysical Research Letters; Vol. 40; No. 5; 847-852; 10.1002/grl.50259
Sun, Daoyuan and Helmberger, Don V., et el. (2013) Rolling hills on the core–mantle boundary ; Earth and Planetary Science Letters; Vol. 361; 333-342; 10.1016/j.epsl.2012.10.027
Zheng, Yong and Ni, Sidao, et el. (2013) Magnitude and rupture duration from high frequency teleseismic P wave with projected landweber deconvolution ; Science China Earth Sciences; Vol. 56; No. 1; 13-21; 10.1007/s11430-012-4557-2
Zhan, Zhongwen and Helmberger, Don, et el. (2012) Anomalously steep dips of earthquakes in the 2011 Tohoku-Oki source region and possible explanations ; Earth and Planetary Science Letters; Vol. 353-35; 121-133; 10.1016/j.epsl.2012.07.038
Dougherty, Sara L. and Clayton, Robert W., et el. (2012) Seismic structure in central Mexico: Implications for fragmentation of the subducted Cocos plate ; Journal of Geophysical Research B; Vol. 117; Art. No. B09316; 10.1029/2012JB009528
Wei, Shengji and Graves, Robert, et el. (2012) Sources of shaking and flooding during the Tohoku-Oki earthquake: A mixture of rupture styles ; Earth and Planetary Science Letters; Vol. 333-334; 91-100; 10.1016/j.epsl.2012.04.006
Wei, Shengji and Zhan, Zhongwen, et el. (2012) Locating earthquakes with surface waves and centroid moment tensor estimation ; Journal of Geophysical Research B; Vol. 117; Art. No. B04309; 10.1029/2011JB008501
Chu, Risheng and Schmandt, Brandon, et el. (2012) Juan de Fuca subduction zone from a mixture of tomography and waveform modeling ; Journal of Geophysical Research B; Vol. 117; No. B3; Art. No. B03304; 10.1029/2012JB009146
Chu, Risheng and Schmandt, Brandon, et el. (2012) Upper mantle P velocity structure beneath the Midwestern
United States derived from triplicated waveforms ; Geochemistry, Geophysics, Geosystems; Vol. 13; Art. No. Q0Ak04; 10.1029/2011GC003818
Wei, Shengji and Fielding, Eric, et el. (2011) Superficial simplicity of the 2010 El Mayor–Cucapah earthquake of Baja California in Mexico ; Nature Geoscience; Vol. 4; No. 9; 615-618; 10.1038/ngeo1213
Chu, Risheng and Wei, Shengji, et el. (2011) Initiation of the great M_w 9.0 Tohoku–Oki earthquake ; Earth and Planetary Science Letters; Vol. 308; No. 3-4; 277-283; 10.1016/j.epsl.2011.06.031
Simons, Mark and Minson, Sarah E., et el. (2011) The 2011 Magnitude 9.0 Tohoku-Oki Earthquake: Mosaicking the Megathrust from Seconds to Centuries ; Science; Vol. 332; No. 6036; 1421-1425; 10.1126/science.1206731
Zhan, Zhongwen and Wei, Shengji, et el. (2011) Earthquake Centroid Locations Using Calibration from Ambient Seismic Noise ; Bulletin of the Seismological Society of America; Vol. 101; No. 3; 1438-1445; 10.1785/0120100118
Liu, Lijun and Tan, Ying, et el. (2011) Trans-Pacific whole mantle structure ; Journal of Geophysical Research B; Vol. 116; No. B4; B04306; 10.1029/2010JB007907
Sun, Daoyuan and Helmberger, Don (2011) Upper-mantle structures beneath USArray derived from waveform complexity ; Geophysical Journal International; Vol. 184; No. 1; 416-438; 10.1111/j.1365-246X.2010.04847.x
Tan, Ying and Song, Alex, et el. (2010) Surface Wave Path Corrections and Source Inversions in Southern California ; Bulletin of the Seismological Society of America; Vol. 100; No. 6; 2891-2904; 10.1785/0120090063
Luo, Yan and Tan, Ying, et el. (2010) Source Mechanism and Rupture Directivity of the 18 May 2009 M_W 4.6 Inglewood, California, Earthquake ; Bulletin of the Seismological Society of America; Vol. 100; No. 6; 3269-3277; 10.1785/0120100087
Zhan, Zhongwen and Ni, Sidao, et el. (2010) Retrieval of Moho-reflected shear wave arrivals from ambient seismic noise ; Geophysical Journal International; Vol. 182; No. 1; 408-420; 10.1111/j.1365-246X.2010.04625.x
Tan, Ying and Helmberger, Don (2010) Rupture Directivity Characteristics of the 2003 Big Bear Sequence ; Bulletin of the Seismological Society of America; Vol. 100; No. 3; 1089-1106; 10.1785/0120090074
Sun, Daoyuan and Helmberger, Don, et el. (2010) A narrow, mid-mantle plume below southern Africa ; Geophysical Research Letters; Vol. 37; L09302; 10.1029/2009GL042339
Ni, Sidao and Helmberger, Don, et el. (2010) Rapid Source Estimation from Global Calibrated Paths ; Seismological Research Letters; Vol. 81; No. 3; 498-504; 10.1785/gssrl.81.3.498
Konca, A. Ozgun and Leprince, Sébastien, et el. (2010) Rupture Process of the 1999 M_w 7.1 Duzce Earthquake from Joint Analysis of SPOT, GPS, InSAR, Strong-Motion, and Teleseismic Data: A Supershear Rupture with Variable Rupture Velocity ; Bulletin of the Seismological Society of America; Vol. 100; No. 1; 267-288; 10.1785/0120090072
Chu, Risheng and Helmberger, Don V., et el. (2010) Mushy magma beneath Yellowstone ; Geophysical Research Letters; Vol. 37; Art. No. L01306; 10.1029/2009GL041656
Chu, Risheng and Zhu, Lupei, et el. (2009) Determination of earthquake focal depths and source time functions in central Asia using teleseismic P waveforms ; Geophysical Research Letters; Vol. 36; L17317; 10.1029/2009GL039494
Sun, Daoyuan and Helmberger, Don, et el. (2009) Direct measures of lateral velocity variation in the deep Earth ; Journal of Geophysical Research B; Vol. 114; No. 5; Art. No. B05303; 10.1029/2008JB005873
Song, Teh-Ru Alex and Helmberger, Donald V., et el. (2009) Subducting slab ultra-slow velocity layer coincident with silent earthquakes in southern Mexico ; Science; Vol. 324; No. 5926; 502-506; 10.1126/science.1167595
Konca, A. Ozgun and Avouac, Jean-Philippe, et el. (2008) Partial rupture of a locked patch of the Sumatra megathrust during the 2007 earthquake sequence ; Nature; Vol. 456; No. 7222; 631-635; 10.1038/nature07572
Sun, Daoyuan and Helmberger, Don (2008) Lower mantle tomography and phase change mapping ; Journal of Geophysical Research B; Vol. 113; No. B10; Art. No. B10305; 10.1029/2007JB005289
Song, Teh-Ru Alex and Helmberger, Don. V. (2007) Validating tomographic model with broad-band waveform modelling: an example from the LA RISTRA transect in the southwestern United States ; Geophysical Journal International; Vol. 171; No. 1; 244-258; 10.1111/j.1365-246X.2007.03508.x
Tan, Ying and Helmberger, Don (2007) A new method for determining small earthquake source parameters using short-period P waves ; Bulletin of the Seismological Society of America; Vol. 97; No. 4; 1176-1195; 10.1785/0120060251
Sun, Daoyuan and Helmberger, Don, et el. (2007) Seismological support for the metastable superplume model, sharp features, and phase changes within the lower mantle ; Proceedings of the National Academy of Sciences of the United States of America; Vol. 104; No. 22; 9151-9155; PMCID PMC1890462; 10.1073/pnas.0608160104
Chen, Min and Tromp, Jeroen, et el. (2007) Waveform modeling of the slab beneath Japan ; Journal of Geophysical Research B; Vol. 112; No. B2; Art. No. B02305; 10.1029/2006JB004394
Sun, Xinlei and Song, Xiaodong, et el. (2007) Evidence for a chemical-thermal structure at base of mantle from sharp lateral P-wave variations beneath Central America ; Proceedings of the National Academy of Sciences of the United States of America; Vol. 104; No. 1; 26-30; PMCID PMC1765446; 10.1073/pnas.0609143103
Konca, A. Ozgun and Hjorleifsdottir, Vala, et el. (2007) Rupture Kinematics of the 2005 M_w 8.6 Nias–Simeulue Earthquake from the Joint Inversion of Seismic and Geodetic Data ; Bulletin of the Seismological Society of America; Vol. 97; No. 1; S307-S322; 10.1785/0120050632
Avouac, Jean-Philippe and Ayoub, François, et el. (2006) The 2005, M_w 7.6 Kashmir earthquake: Sub-pixel correlation of ASTER images and seismic waveforms analysis ; Earth and Planetary Science Letters; Vol. 249; No. 3-4; 514-528; 10.1016/j.epsl.2006.06.025
Helmberger, D. and Lay, T., et el. (2005) Deep mantle structure and the postperovskite phase transition ; Proceedings of the National Academy of Sciences of the United States of America; Vol. 102; No. 48; 17257-17263; PMCID PMC1297654; 10.1073/pnas.0502504102
Ammon, Charles J. and Ji, Chen, et el. (2005) Rupture Process of the 2004 Sumatra-Andaman Earthquake ; Science; Vol. 308; No. 5725; 1133-1139; 10.1126/science.1112260
Ni, Sidao and Kanamori, Hiroo, et el. (2005) Seismology: Energy radiation from the Sumatra earthquake ; Nature; Vol. 434; No. 7033; 582-582; 10.1038/434582a
Helmberger, Don V. and Ni, Sidao (2005) Approximate 3D Body-Wave Synthetics for Tomographic Models ; Bulletin of the Seismological Society of America; Vol. 95; No. 1; 212-224; 10.1785/0120040004
Helmberger, Don V. and Ni, Sidao (2005) Seismic Modeling Constraints on the South African Super Plume ; ISBN 0-87590-425-4; Earth's Deep Mantle: Structure, Composition, and Evolution; 63-81; 10.1029/160GM06
Ji, Chen and Helmberger, Don V., et el. (2004) A Teleseismic Study of the 2002 Denali Fault, Alaska, Earthquake and Implications for Rapid Strong-Motion Estimation ; Earthquake Spectra; Vol. 20; No. 3; 617-637; 10.1193/1.1778388
Song, Teh-Ru Alex and Helmberger, Don V., et el. (2004) Low-velocity zone atop the 410-km seismic discontinuity in the northwestern United States ; Nature; Vol. 427; No. 6974; 530-533; 10.1038/nature02231
Savage, Brian and Helmberger, Don V. (2004) Site response from incident Pnl waves ; Bulletin of the Seismological Society of America; Vol. 94; No. 1; 357-362; 10.1785/0120030145
Ni, Sidao and Cormier, Vernon F., et el. (2003) A Comparison of Synthetic Seismograms for 2D Structures: Semianalytical versus Numerical ; Bulletin of the Seismological Society of America; Vol. 93; No. 6; 2752-2757; 10.1785/0120030011
Ni, Sidao and Helmberger, Don V. (2003) Further constraints on the African superplume structure ; Physics of the Earth and Planetary Interiors; Vol. 140; No. 1-3; 243-251; 10.1016/j.pepi.2003.07.011
Ji, Chen and Helmberger, Donald V., et el. (2003) Slip history and dynamic implications of the 1999 Chi-Chi, Taiwan, earthquake ; Journal of Geophysical Research B; Vol. 108; No. B9; Art. No. 2412; 10.1029/2002JB001764
Savage, Brian and Ji, Chen, et el. (2003) Velocity variations in the uppermost mantle beneath the southern Sierra Nevada and Walker Lane ; Journal of Geophysical Research B; Vol. 108; No. B7; Art. No. 2325; 10.1029/2001JB001393
Ni, Sidao and Helmberger, Don V. (2003) Ridge-like lower mantle structure beneath South Africa ; Journal of Geophysical Research B; Vol. 108; No. B2; Art. No. 2094; 10.1029/2001JB001545
Ni, Sidao and Helmberger, Don V. (2003) Seismological constraints on the South African superplume;
could be the oldest distinct structure on earth ; Earth and Planetary Science Letters; Vol. 206; No. 1-2; 119-131; 10.1016/S0012-821X(02)01072-5
Melbourne, Timothy I. and Helmberger, Donald V. (2002) Whole mantle shear structure beneath the East Pacific Rise ; Journal of Geophysical Research B; Vol. 107; No. B9; Art. No. 2204; 10.1029/2001JB000332
Ni, Sidao and Tan, Eh, et el. (2002) Sharp Sides to the African Superplume ; Science; Vol. 296; No. 5574; 1850-1852; 10.1126/science.1070698
Rivera, Luis and Sieh, Kerry, et el. (2002) A Comparative Study of the Sumatran Subduction-Zone Earthquakes of 1935 and 1984 ; Bulletin of the Seismological Society of America; Vol. 92; No. 5; 1721-1736; 10.1785/0120010106
Ji, Chen and Wald, David J., et el. (2002) Source Description of the 1999 Hector Mine, California, Earthquake, Part I: Wavelet Domain Inversion Theory and Resolution Analysis ; Bulletin of the Seismological Society of America; Vol. 92; No. 4; 1192-1207; 10.1785/0120000916
Ji, Chen and Wald, David J., et el. (2002) Source Description of the 1999 Hector Mine, California, Earthquake, Part II: Complexity of Slip History ; Bulletin of the Seismological Society of America; Vol. 92; No. 4; 1208-1226; 10.1785/0120000917
Ji, Chen and Helmberger, Donald V., et el. (2001) Slip distribution and tectonic implication of the 1999 Chi‐Chi, Taiwan, Earthquake ; Geophysical Research Letters; Vol. 28; No. 23; 4379-4382; 10.1029/2001GL013225
Melbourne, Tim and Helmberger, Don (2001) Mantle control of plate boundary deformation ; Geophysical Research Letters; Vol. 28; No. 20; 4003-4006; 10.1029/2001GL013167
Saikia, Chandan K. and Helmberger, D. V., et el. (2001) Effects of Source RDP Models and Near-source Propagation: Implication for Seismic Yield Estimation ; Pure and Applied Geophysics; Vol. 158; No. 11; 2173-2216; 10.1007/pl00001145
Savage, Brian and Helmberger, Don V. (2001) Kursk Explosion ; Bulletin of the Seismological Society of America; Vol. 91; No. 4; 753-759; 10.1785/0120000295
Luo, Sheng-Nian and Ni, Sidao, et el. (2001) Evidence for a sharp lateral variation of velocity at the
core-mantle boundary from multipathed PKPab ; Earth and Planetary Science Letters; Vol. 189; No. 3-4; 155-164; 10.1016/S0012-821X(01)00364-8
Ni, Sidao and Helmberger, Don V. (2001) Probing an ultra-low velocity zone at the core mantle boundary with P and S waves ; Geophysical Research Letters; Vol. 28; No. 12; 2345-2348; 10.1029/2000GL012766
Ni, Sidao and Helmberger, Don V. (2001) Horizontal transition from fast to slow structures at the
core-mantle boundary; South Atlantic ; Earth and Planetary Science Letters; Vol. 187; No. 3-4; 301-310; 10.1016/S0012-821X(01)00273-4
Helmberger, D. V. and Song, X. J., et el. (2001) Crustal complexity from regional waveform tomography: Aftershocks of the 1992 Landers earthquake, California ; Journal of Geophysical Research B; Vol. 106; No. B1; 609-620; 10.1029/2000JB900231
Helmberger, Don and Ni, Sidao, et el. (2000) Seismic evidence for ultralow-velocity zones beneath Africa and eastern Atlantic ; Journal of Geophysical Research B; Vol. 105; No. B10; 23865-23878; 10.1029/2000JB900143
Ji, Chen and Helmberger, Don V., et el. (2000) Basin Structure Estimation by Waveform Modeling: Forward and Inverse Methods ; Bulletin of the Seismological Society of America; Vol. 90; No. 4; 964-976; 10.1785/0119990080
Ni, Sidao and Ding, Xiaoming, et el. (2000) Constructing synthetics from deep earth tomographic models ; Geophysical Journal International; Vol. 140; No. 1; 71-82; 10.1046/j.1365-246x.2000.00982.x
Scrivner, Craig W. and Helmberger, Donald V. (1999) Finite-difference modeling of two aftershocks of the 1994 Northridge, California, earthquake ; Bulletin of the Seismological Society of America; Vol. 89; No. 6; 1505-1518
Sidorin, Igor and Gurnis, Michael, et el. (1999) Evidence for a Ubiquitous Seismic Discontinuity at the Base of the Mantle ; Science; Vol. 286; No. 5443; 1326-1331; 10.1126/science.286.5443.1326
Ni, Sidao and Ding, Xiaoming, et el. (1999) Low-velocity structure beneath Africa from forward modeling ; Earth and Planetary Science Letters; Vol. 170; No. 4; 497-507; 10.1016/S0012-821X(99)00121-1
Sidorin, Igor and Gurnis, Michael, et el. (1999) Dynamics of a phase change at the base of the mantle consistent with seismological observations ; Journal of Geophysical Research B; Vol. 104; No. B4; 15005-15023; 10.1029/1999JB900065
Scrivner, Craig W. and Helmberger, Donald V. (1999) Variability of ground motions in southern California—data from the 1995 to 1996 Ridgecrest sequence ; Bulletin of the Seismological Society of America; Vol. 89; No. 3; 626-639
Thio, Hong Kie and Song, Xi, et el. (1999) Seismic source and structure estimation in the western
Mediterranean using a sparse broadband network ; Journal of Geophysical Research B; Vol. 104; No. B1; 845-861; 10.1029/98JB01498
Ritsema, Jeroen and Ni, Sidao, et el. (1998) Evidence for strong shear velocity reductions and velocity gradients in the lower mantle beneath Africa ; Geophysical Research Letters; Vol. 25; No. 23; 4245-4248; 10.1029/1998GL900127
Jones, Laura E. and Helmberger, Donald V. (1998) Earthquake Source Parameters and Fault Kinematics in the Eastern California Shear Zone ; Bulletin of the Seismological Society of America; Vol. 88; No. 6; 1337-1352
Helmberger, D. V. and Wen, L., et el. (1998) Seismic evidence that the source of the Iceland hotspot lies at the core-mantle boundary ; Nature; Vol. 396; No. 6708; 251-255; 10.1038/24357
Sidorin, Igor and Gurnis, Michael, et el. (1998) Interpreting D" seismic structure using synthetic waveforms computed from dynamic models ; Earth and Planetary Science Letters; Vol. 163; No. 1-4; 31-41; 10.1016/S0012-821X(98)00172-1
Song, Xiaodong and Helmberger, Don V. (1998) Seismic Evidence for an Inner Core Transition Zone ; Science; Vol. 282; No. 5390; 924-927; 10.1126/science.282.5390.924
Zhu, Lupei and Helmberger, Donald V. (1998) Moho Offset Across the Northern Margin of the Tibetan Plateau ; Science; Vol. 281; No. 5380; 1170-1172; 10.1126/science.281.5380.1170
Wen, Lianxing and Helmberger, Donald V. (1998) A two-dimensional P-SV hybrid method and its application to modeling localized structures near the core-mantle boundary ; Journal of Geophysical Research B; Vol. 103; No. B8; 17,901-17,918; 10.1029/98JB01276
Garnero, Edward J. and Helmberger, Donald V. (1998) Further structural constraints and uncertainties of a thin
laterally varying ultralow-velocity layer at the base of the mantle ; Journal of Geophysical Research B; Vol. 103; No. B6; 12,495-12,509; 10.1029/98JB00700
Melbourne, Tim and Helmberger, Don (1998) Fine structure of the 410-km discontinuity ; Journal of Geophysical Research B; Vol. 103; No. B5; 10,091-10,102; 10.1029/98JB00164
Wen, Lianxing and Helmberger, Donald V. (1998) Ultra-Low Velocity Zones Near the Core-Mantle Boundary from Broadband PKP Precursors ; Science; Vol. 279; No. 5357; 1701-1703; 10.1126/science.279.5357.1701
Sato, Toshiaki and Helmberger, Donald V., et el. (1998) Estimates of regional and local strong motions during the great 1923 Kanto, Japan, earthquake (Ms 8.2). Part 1: Source estimation of a calibration event and modeling of wave propagation paths ; Bulletin of the Seismological Society of America; Vol. 88; No. 1; 183-205
Song, Xi J. and Helmberger, Donald V. (1998) Pseudo Green's Functions and Waveform Tomography ; Bulletin of the Seismological Society of America; Vol. 88; No. 1; 304-312
Helmberger, Don (1998) Helmberger Receives Lehmann Medal ; Eos; Vol. 79; No. 4; 47; 10.1029/98EO00032
Zhu, Lupei and Helmberger, Donald V., et el. (1997) Regional waveform calibration in the Pamir-Hindu Kush region ; Journal of Geophysical Research B; Vol. 102; No. B10; 22,799-22,813; 10.1029/97JB01855
Song, Xiaodong and Helmberger, Don V. (1997) PKP differential travel times: Implications for 3-D lower mantle structure ; Geophysical Research Letters; Vol. 24; No. 15; 1863-1866; 10.1029/97GL01761
Song, Xi J. and Helmberger, Donald V. (1997) Northridge aftershocks, a source study with TERRAscope data ; Bulletin of the Seismological Society of America; Vol. 87; No. 4; 1024-1034
Saikia, Chandan K. and Helmberger, D. V. (1997) Approximation of Rupture Directivity in Regional Phases Using Upgoing and Downgoing Wave Fields ; Bulletin of the Seismological Society of America; Vol. 87; No. 4; 987-998
Woods, Bradley B. and Helmberger, Donald V. (1997) Regional Seismic Discriminants Using Wave-Train Energy Ratios ; Bulletin of the Seismological Society of America; Vol. 87; No. 3; 589-605
Wen, Lianxing and Helmberger, Donald V. (1997) Propagational Corrections for Basin Structure: Landers Earthquake ; Bulletin of the Seismological Society of America; Vol. 87; No. 3; 782-787
Ding, Xiaoming and Helmberger, Donald V. (1997) Modelling D″ structure beneath Central America with broadband seismic data ; Physics of the Earth and Planetary Interiors; Vol. 101; No. 3-4; 245-270; 10.1016/S0031-9201(97)00001-0
Pino, N. Alessandro and Helmberger, Donald V. (1997) Upper mantle compressional velocity structure beneath the West Mediterranean Basin ; Journal of Geophysical Research B; Vol. 102; No. B2; 2953-2967; 10.1029/96JB03461
Mori, Jim and Helmberger, Donald (1996) Large-amplitude Moho reflections (SmS) from Landers aftershocks, southern California ; Bulletin of the Seismological Society of America; Vol. 86; No. 6; 1845-1852
Zhu, Lupei and Helmberger, Donald V. (1996) Advancement in Source Estimation Techniques Using Broadband Regional Seismograms ; Bulletin of the Seismological Society of America; Vol. 86; No. 5; 1634-1641
Helmberger, D. V. and Garnero, E. J., et el. (1996) Modeling two-dimensional structure at the core-mantle
boundary ; Journal of Geophysical Research B; Vol. 101; No. B6; 13,963-13,972; 10.1029/96JB00534
Song, Xi J. and Helmberger, Donald V. (1996) Source Estimation of Finite Faults from Broadband Regional Networks ; Bulletin of the Seismological Society of America; Vol. 86; No. 3; 797-804
Garnero, Edward J. and Helmberger, Donald V. (1996) Seismic detection of a thin laterally varying boundary layer
at the base of the mantle beneath the central-Pacific ; Geophysical Research Letters; Vol. 23; No. 9; 977-980; 10.1029/95GL03603
Song, Xi J. and Helmberger, Donald V., et el. (1996) Broad-Band Modelling of Regional Seismograms: the Basin and Range Crustal Structure ; Geophysical Journal International; Vol. 125; No. 1; 15-29; 10.1111/j.1365-246X.1996.tb06531.x
Zhu, Lupei and Helmberger, Donald V. (1996) Intermediate depth earthquakes beneath the India-Tibet
collision zone ; Geophysical Research Letters; Vol. 23; No. 5; 435-438; 10.1029/96GL00385
Zhao, Lian-She and Helmberger, Donald V. (1996) Regional moments, energy levels, and a new discriminant ; Pure and Applied Geophysics; Vol. 146; No. 2; 281-304; 10.1007/BF00876494
Jones, Laura E. and Helmberger, Donald V. (1996) Seismicity and stress-drop in the eastern Transverse ranges,
Southern California ; Geophysical Research Letters; Vol. 23; No. 3; 233-236; 10.1029/96GL00012
Wald, David J. and Heaton, Thomas H., et el. (1996) Strong-Motion and Broadband Teleseismic Analysis of the Earthquake for Rupture Process and Hazards Assessment
Helmberger, Don V. and Woods, Brad (1996) Regional Source Parameters, Seismic Energy, and Discrimination ; ISBN 9780792338116; Monitoring a comprehensive test ban treaty; 365-383
Helmberger, Don V. and Zhao, Lian-She, et el. (1996) Construction of Synthetics for 2D structures; core phases ; ISBN 978-8877940803; Seismic modelling of earth structure; 183-221
Song, Xi J. and Jones, Laura E., et el. (1995) Source characteristics of the 17 January 1994 Northridge, California, earthquake from regional broadband modeling ; Bulletin of the Seismological Society of America; Vol. 85; No. 6; 1591-1603
Mori, Jim and Helmberger, Donald V. (1995) Localized boundary layer below the mid-Pacific velocity anomaly identified from a PeP precursor ; Journal of Geophysical Research B; Vol. 100; No. B10; 20,359-20,365; 10.1029/95JB02243
Garnero, Edward J. and Helmberger, Donald V. (1995) Seismic Resolution of the Earth's Outermost Core in Relation to Lower Mantle Heterogeneity
Garnero, Edward J. and Helmberger, Donald V. (1995) A very slow basal layer underlying large-scale low-velocity
anomalies in the lower mantle beneath the Pacific:
evidence from core phases ; Physics of the Earth and Planetary Interiors; Vol. 91; No. 1-3; 161-176; 10.1016/0031-9201(95)03039-Y
Scrivner, Craig W. and Helmberger, Donald V. (1995) Preliminary work on an early warning and rapid response program for moderate earthquakes ; Bulletin of the Seismological Society of America; Vol. 85; No. 4; 1257-1265
Song, Xiaodong and Helmberger, Don V. (1995) Depth dependence of anisotropy of Earth's inner core ; Journal of Geophysical Research B; Vol. 100; No. B6; 9805-9816; 10.1029/95JB00244
Song, Xiaodong and Helmberger, Don V. (1995) A P wave velocity model of Earth's core ; Journal of Geophysical Research B; Vol. 100; No. B7; 9817-9830; 10.1029/94JB03135
Garnero, Edward J. and Helmberger, Donald V. (1995) On seismic resolution of lateral heterogeneity in the Earth's outermost core ; Physics of the Earth and Planetary Interiors; Vol. 88; No. 2; 117-130; 10.1016/0031-9201(94)02976-I
Scrivner, Craig W. and Helmberger, Donald V. (1994) Seismic Waveform Modeling in the Los Angeles Basin ; Bulletin of the Seismological Society of America; Vol. 84; No. 5; 1310-1326
Saikia, Chandan K. and Dreger, Douglas S., et el. (1994) Modeling of Energy Amplification Recorded within Greater Los Angeles Using Irregular Structure ; Bulletin of the Seismological Society of America; Vol. 84; No. 1; 47-61
Zhao, Lian-She and Helmberger, Donald V. (1994) Source Estimation from Broadband Regional Seismograms ; Bulletin of the Seismological Society of America; Vol. 84; No. 1; 91-104
Jones, L. E. and Hough, S. E., et el. (1993) Rupture process of the June 28, 1992 Big Bear Earthquake ; Geophysical Research Letters; Vol. 20; No. 18; 1907-1910; 10.1029/93GL02046
Woods, Bradley B. and Kedar, Sharon, et el. (1993) M_L:M_0 as a regional seismic discriminant ; Bulletin of the Seismological Society of America; Vol. 83; No. 4; 1167-1183
Wald, David J. and Kanamori, Hiroo, et el. (1993) Source study of the 1906 San Francisco earthquake ; Bulletin of the Seismological Society of America; Vol. 83; No. 4; 981-1019
Helmberger, Donald V. and Dreger, Douglas S., et el. (1993) Impact of Broadband Seismology on the Understanding of Strong Motions ; Bulletin of the Seismological Society of America; Vol. 83; No. 3; 830-850
Garnero, E. J. and Helmberger, D. V., et el. (1993) Preliminary observations from the use of US-Soviet Joint Seismic Program data to model upper mantle triplications beneath Asia ; Geophysical Journal International; Vol. 113; No. 1; 252-259; 10.1111/j.1365-246X.1993.tb02544.x
Helmberger, D. V. and Somerville, P. G., et el. (1992) The Location and Source Parameters of the Lompoc, California, Earthquake of 4 November 1927 ; Bulletin of the Seismological Society of America; Vol. 82; No. 4; 1678-1709
Wald, David J. and Hartzell, Stephen H., et el. (1992) Reply to Arthur Frankel's "Comment on 'Rupture process of the 1987 Superstition Hills earthquake from the inversion of strong-motion data'" ; Bulletin of the Seismological Society of America; Vol. 82; No. 3; 1519-1533
Bent, Allison L. and Helmberger, Donald V. (1991) A re-examination of historic earthquakes in the San Jacinto fault zone, California ; Bulletin of the Seismological Society of America; Vol. 81; No. 6; 2289-2309
Burdick, L. J. and Garnero, E. J., et el. (1991) Time Domain Regional Discriminants
Wald, David J. and Helmberger, Donald V., et el. (1991) Rupture model of the 1989 Loma Prieta earthquake from the inversion of strong-motion and broadband teleseismic data ; Bulletin of the Seismological Society of America; Vol. 81; No. 5; 1540-1572
Dreger, Douglas S. and Helmberger, Donald V. (1991) Complex faulting deduced from broadband modeling of the 28 February 1990 Upland earthquake (M_L = 5.2) ; Bulletin of the Seismological Society of America; Vol. 81; No. 4; 1129-1144
Zhao, Lian-She and Helmberger, Donald V., et el. (1991) Shear-velocity structure of the crust and upper mantle beneath the Tibetan Plateau and southeastern China ; Geophysical Journal International; Vol. 105; No. 3; 713-730; 10.1111/j.1365-246X.1991.tb00807.x
Bent, Allison L. and Helmberger, Donald V. (1991) Seismic characteristics of earthquakes along the offshore extension of the western transverse ranges, California ; Bulletin of the Seismological Society of America; Vol. 81; No. 2; 399-422
Hauksson, Egill and Jones, Lucile, et el. (1991) Southern California Seismographic Network; report to the U.S. Geological Survey, August 21, 1990 ; 10.3133/ofr9138
Dreger, Douglas S. and Helmberger, Donald V. (1990) Broadband modeling of local earthquakes ; Bulletin of the Seismological Society of America; Vol. 80; No. 5; 1162-1179
Wald, David J. and Helmberger, Donald V., et el. (1990) Rupture process of the 1987 Superstition Hills earthquake from the inversion of strong-motion data ; Bulletin of the Seismological Society of America; Vol. 80; No. 5; 1079-1098
Somerville, Paul G. and McLaren, James P., et el. (1990) The 25 November 1988 Saguenay, Quebec, Earthquake: Source Parameters and the Attenuation of Strong Ground Motion ; Bulletin of the Seismological Society of America; Vol. 80; No. 5; 1118-1143
Bent, Allison L. and Helmberger, Donald V., et el. (1989) Waveform modeling of the November 1987 Superstition Hills earthquake ; Bulletin of the Seismological Society of America; Vol. 79; No. 2; 500-514
Stead, Richard J. and Helmberger, Donald V. (1988) Numerical-analytical interfacing in two dimensions with applications to modeling NTS seismograms ; Pure and Applied Geophysics; Vol. 128; No. 1-2; 157-193; 10.1007/BF01772596
Vidale, John E. and Helmberger, Donald V. (1988) Elastic finite-difference modeling of the 1971 San Fernando, California earthquake ; Bulletin of the Seismological Society of America; Vol. 78; No. 1; 122-141
Helmberger, Donald V. and Vidale, John E. (1988) Modeling strong motions produced by earthquakes with two-dimensional numerical codes ; Bulletin of the Seismological Society of America; Vol. 78; No. 1; 109-121
Burger, R. W. and Somerville, P. G., et el. (1987) The effect of crustal structure on strong ground motion attenuation relations in eastern North America ; Bulletin of the Seismological Society of America; Vol. 77; No. 2; 420-439
Somerville, P. G. and McLaren, J. P., et el. (1987) Comparison of source scaling relations of eastern and western North American earthquakes ; Bulletin of the Seismological Society of America; Vol. 77; No. 2; 322-346
Wallace, T. C. and Helmberger, D. V., et el. (1986) Reply to comments by A. Douglas, J. B. Young, and N. S. Lyman and a note on the revised moments for Pahute Mesa tectonic release ; Bulletin of the Seismological Society of America; Vol. 76; No. 1; 313-318
Vidale, John and Helmberger, Donald V., et el. (1985) Finite-difference seismograms for SH waves ; Bulletin of the Seismological Society of America; Vol. 75; No. 6; 1765-1782
Liu, Hsui-Lin and Helmberger, Donald V. (1985) The 23:19 aftershock of the 15 October 1979 Imperial Valley earthquake: More evidence for an asperity ; Bulletin of the Seismological Society of America; Vol. 75; No. 3; 689-708
Wallace, Terry C. and Helmberger, Donald V., et el. (1985) Evidence of tectonic release from underground nuclear explosions in long-period S waves ; Bulletin of the Seismological Society of America; Vol. 75; No. 1; 157-174
Scott, Patricia and Helmberger, Donald V. (1985) Applications of the transmitted Kirchhoff-Holmholtz method to transmitted body waves and possible structural effects at NTS ; Bulletin of the Seismological Society of America; Vol. 75; No. 1; 131-156
Burdick, L. J. and Barker, J. S., et el. (1985) Linear Elastic Waveform Modeling in the Inelastic Region of Underground Nuclear Explosions
Lay, Thorne and Helmberger, Don V., et el. (1984) Source models and yield-scaling relations for underground nuclear explosions at Amchitka Island ; Bulletin of the Seismological Society of America; Vol. 74; No. 3; 843-862
Lay, Thorne and Wallace, Terry C., et el. (1984) The effects of tectonic release on short-period P waves from NTS explosions ; Bulletin of the Seismological Society of America; Vol. 74; No. 3; 819-842
Lay, Thorne and Helmberger, Donald V. (1983) Body-wave amplitude and travel-time correlations across North America ; Bulletin of the Seismological Society of America; Vol. 73; No. 4; 1063-1076
Liu, Hsui-Lin and Helmberger, Donald V. (1983) The near-source ground motion of the 6 August 1979 Coyote Lake, California, earthquake ; Bulletin of the Seismological Society of America; Vol. 73; No. 1; 201-218
Hadley, David M. and Helmberger, Donald V., et el. (1982) Peak acceleration scaling studies ; Bulletin of the Seismological Society of America; Vol. 72; No. 3; 959-979
Hartzell, Stephen and Helmberger, Donald V. (1982) Strong-motion modeling of the Imperial Valley earthquake of 1979 ; Bulletin of the Seismological Society of America; Vol. 72; No. 2; 571-596
Ebel, John E. and Helmberger, Donald V. (1982) P-wave complexity and fault asperities: The Borrego Mountain, California, earthquake of 1968 ; Bulletin of the Seismological Society of America; Vol. 72; No. 2; 413-437
Wallace, Terry C. and Helmberger, Don V., et el. (1981) A broadband study of the 13 August 1978 Santa Barbara earthquake ; Bulletin of the Seismological Society of America; Vol. 71; No. 6; 1701-1718
Helmberger, Donald V. and Hadley, David M. (1981) Seismic source functions and attenuation from local and teleseismic observations of the NTS events Jorum and Handley ; Bulletin of the Seismological Society of America; Vol. 71; No. 1; 51-67
Helmberger, D. V. and Engen, G. R. (1980) Modeling the long-period body waves from shallow earthquakes at regional ranges ; Bulletin of the Seismological Society of America; Vol. 70; No. 5; 1699-1714
Hadley, David M. and Helmberger, Donald V. (1980) Simulation of strong ground motions ; Bulletin of the Seismological Society of America; Vol. 70; No. 2; 617-630
Heaton, Thomas H. and Helmberger, Donald V. (1979) Generalized ray models of the San Fernando Earthquake ; Bulletin of the Seismological Society of America; Vol. 69; No. 5; 1311-1341
Burdick, L. J. and Helmberger, D. V. (1979) Time functions appropriate for nuclear explosions ; Bulletin of the Seismological Society of America; Vol. 69; No. 4; 957-973
Helmberger, D. V. and Burdick, L. J. (1979) Synthetic Seismograms ; Annual Review of Earth and Planetary Sciences; Vol. 7; 417-442; 10.1146/annurev.ea.07.050179.002221
Hong, Tai-Lin and Helmberger, Donald V. (1978) Glorified optics and wave propagation in nonplanar structure ; Bulletin of the Seismological Society of America; Vol. 68; No. 5; 1313-1330
Mellman, George R. and Helmberger, Donald V. (1978) A modified first-motion approximation for the synthesis of body-wave seismograms ; Geophysical Journal International; Vol. 54; No. 1; 129-140; 10.1111/j.1365-246X.1978.tb06760.x
Helmberger, D. V. and Engen, G. (1978) Fine structure of an oceanic crustal section near the East Pacific Rise ; Bulletin of the Seismological Society of America; Vol. 68; No. 2; 369-382
Heaton, Thomas H. and Helmberger, Donald V. (1978) Predictability of strong ground motion in the Imperial Valley: Modeling the M4.9, November 4, 1976 Brawley earthquake ; Bulletin of the Seismological Society of America; Vol. 68; No. 1; 31-48
Harkrider, D. G. and Helmberger, D. V. (1978) A note on nonequivalent quadrupole source cylindrical shear potentials which give equal displacements ; Bulletin of the Seismological Society of America; Vol. 68; No. 1; 125-132
Helmberger, Donald V. and Jennings, Paul C. (1978) Strong ground motion : N.S.F. Seminar-Workshop Proceedings
Heaton, Thomas H. and Helmberger, Donald V. (1978) Synthesis of San Fernando strong-motion records
Hong, Tai-Lin and Helmberger, Donald V. (1977) Generalized ray theory for dipping structure ; Bulletin of the Seismological Society of America; Vol. 67; No. 4; 995-1008
Heaton, Thomas H. and Helmberger, Donald V. (1977) A study of the strong ground motion of the Borrego Mountain, California, earthquake ; Bulletin of the Seismological Society of America; Vol. 67; No. 2; 315-330
Helmberger, Donald V. and Johnson, Lane R. (1977) Source parameters of moderate size earthquakes and the importance of receiver crustal structure in interpreting observations of local earthquakes ; Bulletin of the Seismological Society of America; Vol. 67; No. 2; 301-313
King, David and Helmberger, Donald V. (1975) Time functions appropriate for some aftershocks of the Point Mugu, California earthquake of February 21, 1973 ; Bulletin of the Seismological Society of America; Vol. 65; No. 1; 127-132
Langston, Charles A. and Helmberger, Donald V. (1974) Interpretation of body and Rayleigh waves from NTS to Tucson ; Bulletin of the Seismological Society of America; Vol. 64; No. 6; 1919-1929
Mellman, George R. and Helmberger, Donald V. (1974) High-frequency attenuation by a thin high-velocity layer ; Bulletin of the Seismological Society of America; Vol. 64; No. 5; 1383-1388
Burdick, L. J. and Helmberger, D. V. (1974) Time functions appropriate for deep earthquakes ; Bulletin of the Seismological Society of America; Vol. 64; No. 5; 1419-1427
Helmberger, Donald V. (1974) Generalized ray theory for shear dislocations ; Bulletin of the Seismological Society of America; Vol. 64; No. 1; 45-64
Helmberger, Donald V. (1973) Numerical seismograms of long-period body waves from seventeen to forty degrees ; Bulletin of the Seismological Society of America; Vol. 63; No. 2; 633-646
Allen, Clarence R. and Helmberger, Donald V. (1973) Search for temporal changes in seismic velocities using large explosions in southern California
Helmberger, D. V. and Harkrider, D. G. (1972) Seismic Source Descriptions of Underground Explosions and a Depth Discriminate ; Geophysical Journal International; Vol. 31; No. 1-3; 45-66; 10.1111/j.1365-246X.1972.tb02358.x
Helmberger, Donald V. (1972) Long-period body-wave propagation from 4° to 13° ; Bulletin of the Seismological Society of America; Vol. 62; No. 1; 325-341
Abrams, M. and Allen, C., et el. (1971) Preliminary seismological and geological studies of the San Fernando, California, earthquake of February 9 1971 ; Bulletin of the Seismological Society of America; Vol. 61; No. 2; 491-495
