Chen Ji

Professor
ji@geol.ucsb.edu

Office Location: 

Webb 2036

Website: 

Research website

Specialization: 

Geophysics

Research: 

Research effects focus on exploring the physical processes of large earthquakes with various modern geophysical observations, such as broadband seismograms, high-rate GPS, and radar interferometry.

Current research interests:

  • Developing real-time finite fault inversion systems to quickly evaluate the catastrophic tragedies caused by large shallow earthquakes in regional and teleseismic distances.
  • Globally surveying the seismic nucleation phases of great earthquakes
  • Analyzing the uncertainties associating with the source models of large earthquakes
  • Capturing the “early” post-seismic deformation following the large earthquakes by joint inverting the seismic and geodetic data

 

Recent large earthquakes

Publications: 

Publications since 2000

  1. Krishnan, S., et al., Rapid Estimation of Damage to Tall Buildings Using Near Real-Time Earthquake and Archived Structural Simulations. Bulletin of the Seismological Society of America, 2012. 102(6): p. 2646-2666.
  2. Shao, G.F. and C. Ji, What the exercise of the SPICE source inversion validation BlindTest 1 did not tell you. Geophysical Journal International, 2012. 189(1): p. 569-590.
  3. Shao, G.F., C. Ji, and E. Hauksson, Rupture process and energy budget of the 29 July 2008 M-w 5.4 Chino Hills, California, earthquake. Journal of Geophysical Research-Solid Earth, 2012. 117.
  4. Tanimoto, T., C. Ji, and M. Igarashi, An approach to detect afterslips in giant earthquakes in the normal-mode frequency band. Geophysical Journal International, 2012. 190(2): p. 1097-1110.
  5. Shao, G.F., C. Ji, and D.P. Zhao, Rupture process of the 9 March, 2011 Mw 7.4 Sanriku-Oki, Japan earthquake constrained by jointly inverting teleseismic waveforms, strong motion data and GPS observations. Geophysical Research Letters, 2011. 38.
  6. Shao, G.F., et al., Focal mechanism and slip history of the 2011 M-w 9.1 off the Pacific coast of Tohoku Earthquake, constrained with teleseismic body and surface waves. Earth Planets and Space, 2011. 63(7): p. 559-564.
  7. Klinger, Y., et al., Introduction to the Special Issue on the 2008 Wenchuan, China, Earthquake. Bulletin of the Seismological Society of America, 2010. 100(5B): p. 2353-2356.
  8. Tanimoto, T. and C. Ji, Afterslip of the 2010 Chilean earthquake. Geophysical Research Letters, 2010. 37.
  9. Liu-Zeng, J., et al., Co-seismic ruptures of the 12 May 2008, M-s 8.0 Wenchuan earthquake, Sichuan: East-west crustal shortening on oblique, parallel thrusts along the eastern edge of Tibet. Earth and Planetary Science Letters, 2009. 286(3-4): p. 355-370.
  10. Han, S.C., et al., Implications of postseismic gravity change following the great 2004 Sumatra-Andaman earthquake from the regional harmonic analysis of GRACE intersatellite tracking data. Journal of Geophysical Research-Solid Earth, 2008. 113(B11).
  11. Konca, A.O., et al., Partial rupture of a locked patch of the Sumatra megathrust during the 2007 earthquake sequence. Nature, 2008. 456(7222): p. 631-635.
  12. Parsons, T., C. Ji, and E. Kirby, Stress changes from the 2008 Wenchuan earthquake and increased hazard in the Sichuan basin. Nature, 2008. 454(7203): p. 509-510.
  13. Song, T., etal, The role of horizontal impulses of the faulting continental slope in generating the 26 December 2004 tsunami. Ocean modeling, 2008. 20(4), 362-379
  14. Chlieh, M., et al., Coseismic slip and afterslip of the great M-w 9.15 Sumatra-Andaman earthquake of 2004. Bulletin of the Seismological Society of America, 2007. 97(1): p. S152-S173.
  15. Hartzell, S., et al., Stability and uncertainty of finite-fault slip inversions: Application to the 2004 Parkfield, California, earthquake. Bulletin of the Seismological Society of America, 2007. 97(6): p. 1911-1934.
  16.  Konca, A.O., et al., 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, 2007. 97(1): p. S307-S322.
  17. Han, S.C., et al., Crustal dilatation observed by GRACE after the 2004 Sumatra-Andaman earthquake. Science, 2006. 313(5787): p. 658-662.
  18. Ammon, C.J., et al., Rupture process of the 2004 Sumatra-Andaman earthquake. Science, 2005. 308(5725): p. 1133-1139.
  19. Bakun, W.H., et al., Implications for prediction and hazard assessment from the 2004 Parkfield earthquake. Nature, 2005. 437(7061): p. 969-974.
  20. Ji, C., et al., Rayleigh-wave multipathing along the west coast of North America. Bulletin of the Seismological Society of America, 2005. 95(6): p. 2115-2124.
  21. Langbein, J., et al., Preliminary report on the 28 September 2004, M 6.0 Parkfield, California earthquake. Seismological Research Letters, 2005. 76(1): p. 10-26.
  22. Hardebeck, J.L., et al., Preliminary report on the 22 December 2003, M 6.5 San Simeon, California earthquake. Seismological Research Letters, 2004. 75(2): p. 155-172.
  23. Ji, C., D.V. Helmberger, and D.J. Wald, A teleseismic study of the 2002 Denali fault, Alaska, earthquake and implications for rapid strong-motion estimation. Earthquake Spectra, 2004. 20(3): p. 617-637.
  24. Ji, C., et al., Slip history of the 2003 San Simeon earthquake constrained by combining 1-Hz GPS, strong motion, and teleseismic data. Geophysical Research Letters, 2004. 31(17).
  25. Anderson, G. and C. Ji, Static stress transfer during the 2002 Nenana Mountain-Denali Fault, Alaska, earthquake sequence. Geophysical Research Letters, 2003. 30(6).
  26. Ji, C., et al., Slip history and dynamic implications of the 1999 Chi-Chi, Taiwan, earthquake. Journal of Geophysical Research-Solid Earth, 2003. 108(B9).
  27. Ma, K.F., et al., Evidence for fault lubrication during the 1999 Chi-Chi, Taiwan, earthquake (Mw7.6). Geophysical Research Letters, 2003. 30(5).
  28. Tsuboi, S., et al., Broadband modeling of the 2002 Denali fault earthquake on the Earth Simulator. Physics of the Earth and Planetary Interiors, 2003. 139(3-4): p. 305-312.
  29. Ji, C., D.J. Wald, and D.V. Helmberger, Source description of the 1999 Hector Mine, California, earthquake, part II: Complexity of slip history. Bulletin of the Seismological Society of America, 2002. 92(4): p. 1208-1226.
  30. Ji, C., D.J. Wald, and D.V. Helmberger, 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, 2002. 92(4): p. 1192-1207.
  31. Ji, C., et al., Slip distribution and tectonic implication of the 1999 Chi-Chi, Taiwan, Earthquake. Geophysical Research Letters, 2001. 28(23): p. 4379-4382.
  32. Ji, C., D.V. Helmberger, and D.J. Wald, Basin structure estimation by waveform modeling: Forward and inverse methods. Bulletin of the Seismological Society of America, 2000. 90(4): p. 964-976.

Courses: 

Classes taught recently

Earth 100 Introduction of Geophysics

Earth 135 Principles of Geophysics

Earth 136 Geophysics (Seismology)