Helmberger, Donald V.

Article from CaltechAUTHORS

• 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
• 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
• 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
• 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
• 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
• 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) 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) A P wave velocity model of Earth's core; Journal of Geophysical Research B; Vol. 100; No. B7; 9817-9830; 10.1029/94JB03135
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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
• 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