| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Seismological Laboratory California Institute of Technology, Pasadena, California 91125
Abstract
One important constraint on source retrieval from regional seismograms comes from the amplitude difference between various phases (such as Pnl/surface wave, SV/SH). Because the misfit errors used in some waveform inversions are normalized by the data and synthetics, the amplitude information in the data has not been fully utilized. In this article, we modify the "cut and paste" source estimation technique (Zhao and Helmberger, 1994) by removing this type of normalization. It is shown that the modified method increases the stability and resolution of inversion. When multiple stations at different distance ranges are used, a distance scaling factor is introduced to compensate for the amplitude decay with distance. By applying the technique to the TERRAscope data, we have determined source mechanisms and depths of 335 southern Californian events with ML 
3.5. The amplitude decays with distance are r1.13 for Pnl, r0.55 for Love waves, and r0.74 for Rayleigh waves. In contrast to generally shallow source depths reported by the southern California short-period network, the depth distribution from waveform inversion shows a strong peak around 12 km with few earthquakes occurring above 5 km and below 20 km.
This article has been cited by other articles:
|
|
 |
|
  H. Yang, L. Zhu, and R. Chu Fault-Plane Determination of the 18 April 2008 Mount Carmel, Illinois, Earthquake by Detecting and Relocating Aftershocks Bulletin of the Seismological Society of America, December 1, 2009; 99(6): 3413 - 3420. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Q. Wang, D. D. Jackson, and Y. Y. Kagan California Earthquakes, 1800-2007: A Unified Catalog with Moment Magnitudes, Uncertainties, and Focal Mechanisms Seismological Research Letters, May 1, 2009; 80(3): 446 - 457. [Full Text] [PDF]
|
|
|
|
|
|
R. B. Herrmann, M. Withers, and H. Benz The April 18, 2008 Illinois Earthquake: An ANSS Monitoring Success Seismological Research Letters, November 1, 2008; 79(6): 830 - 843. [Full Text] [PDF]
|
|
|
|
|
|
E. Hauksson, K. Felzer, D. Given, M. Giveon, S. Hough, K. Hutton, H. Kanamori, V. Sevilgen, S. Wei, and A. Yong Preliminary Report on the 29 July 2008 Mw 5.4 Chino Hills, Eastern Los Angeles Basin, California, Earthquake Sequence Seismological Research Letters, November 1, 2008; 79(6): 855 - 866. [Full Text] [PDF]
|
|
|
|
|
|
A. Rodgers, N. A. Petersson, S. Nilsson, B. Sjogreen, and K. McCandless Broadband Waveform Modeling of Moderate Earthquakes in the San Francisco Bay Area and Preliminary Assessment of the USGS 3D Seismic Velocity Model Bulletin of the Seismological Society of America, April 1, 2008; 98(2): 969 - 988. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. W. Graves The Seismic Response of the San Bernardino Basin Region during the 2001 Big Bear Lake Earthquake Bulletin of the Seismological Society of America, February 1, 2008; 98(1): 241 - 252. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. Li, A. Michelini, L. Zhu, F. Bernardi, and M. Spada Crustal Velocity Structure in Italy from Analysis of Regional Seismic Waveforms Bulletin of the Seismological Society of America, December 1, 2007; 97(6): 2024 - 2039. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Tan and D. Helmberger A New Method for Determining Small Earthquake Source Parameters Using Short-Period P Waves Bulletin of the Seismological Society of America, August 1, 2007; 97(4): 1176 - 1195. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. C. Pechmann, S. J. Nava, F. M. Terra, and J. C. Bernier Local Magnitude Determinations for Intermountain Seismic Belt Earthquakes from Broadband Digital Data Bulletin of the Seismological Society of America, April 1, 2007; 97(2): 557 - 574. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. F. Clinton, E. Hauksson, and K. Solanki An Evaluation of the SCSN Moment Tensor Solutions: Robustness of the Mw Magnitude Scale, Style of Faulting, and Automation of the Method Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1689 - 1705. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Zhao, P. Chen, and T. H. Jordan Strain Green's Tensors, Reciprocity, and Their Applications to Seismic Source and Structure Studies Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1753 - 1763. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. K. Saikia Modeling of the 21 May 1997 Jabalpur Earthquake in Central India: Source Parameters and Regional Path Calibration Bulletin of the Seismological Society of America, August 1, 2006; 96(4A): 1396 - 1421. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Malagnini, P. Bodin, K. Mayeda, and A. Akinci Unbiased Moment-Rate Spectra and Absolute Site Effects in the Kachchh Basin, India, from the Analysis of the Aftershocks of the 2001 Mw 7.6 Bhuj Earthquake Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 456 - 466. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Y. Kagan, D. D. Jackson, and Y. Rong A New Catalog of Southern California Earthquakes, 1800-2005 Seismological Research Letters, January 1, 2006; 77(1): 30 - 38. [Full Text] [PDF]
|
|
|
|
|
|
P. Chen, T. H. Jordan, and L. Zhao Finite-Moment Tensor of the 3 September 2002 Yorba Linda Earthquake Bulletin of the Seismological Society of America, June 1, 2005; 95(3): 1170 - 1180. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Scognamiglio, L. Malagnini, and A. Akinci Ground-Motion Scaling in Eastern Sicily, Italy Bulletin of the Seismological Society of America, April 1, 2005; 95(2): 568 - 578. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. J. Mellors, H. Magistrale, P. Earle, and A. Cogbill Comparison of Four Moderate-Size Earthquakes in Southern California Using Seismology and InSAR Bulletin of the Seismological Society of America, December 1, 2004; 94(6): 2004 - 2014. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Spectral-Element Moment Tensor Inversions for Earthquakes in Southern California Bulletin of the Seismological Society of America, October 1, 2004; 94(5): 1748 - 1761.
|
|
|
|
|
|
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, May 1, 2002; 92(4): 1192 - 1207.
|
|
|
|
|
|
Source Description of the 1999 Hector Mine, California, Earthquake, Part II: Complexity of Slip History Bulletin of the Seismological Society of America, May 1, 2002; 92(4): 1208 - 1226.
|
|
|
|
|
|
Lack of Precursory Slip to the 1999 Hector Mine, California, Earthquake as Constrained by InSAR Bulletin of the Seismological Society of America, May 1, 2002; 92(4): 1443 - 1449.
|
|
|
|
|
|
C. W. Scrivner and D. V. Helmberger Variability of ground motions in southern California--data from the 1995 to 1996 Ridgecrest sequence Bulletin of the Seismological Society of America, June 1, 1999; 89(3): 626 - 639. [Abstract] [PDF]
|
|
|
|
|
|
X. J. Song and D. V. Helmberger Pseudo green's functions and waveform tomography Bulletin of the Seismological Society of America, February 1, 1998; 88(1): 304 - 312. [Abstract] [PDF]
|
|
|
|
|
|
C. K. Saikia and D. V. Helmberger Approximation of rupture directivity in regional phases using upgoing and downgoing wave fields Bulletin of the Seismological Society of America, August 1, 1997; 87(4): 987 - 998. [Abstract] [PDF]
|
|
|
|
|
|
B. B. Woods and D. V. Helmberger Regional seismic discriminants using wave-train energy ratios Bulletin of the Seismological Society of America, June 1, 1997; 87(3): 589 - 605. [Abstract] [PDF]
|
|
|
|
|
|
L. Wen and D. V. Helmberger Propagational corrections for basin structure: Landers earthquake Bulletin of the Seismological Society of America, June 1, 1997; 87(3): 782 - 787. [Abstract] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
