| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Institute of Geophysics and Planetary
Physics
Scripps Institution of Oceanography
University of California at
San Diego
La Jolla, California
92093-0225
pshearer{at}ucsd.edu
(P.S.,
G.L.)
2 Seismological
Laboratory
California Institute of Technology
Pasadena, California
91125
hauksson{at}gps.caltech.edu
(E.H.)
We obtain precise relative relocations for more than 340,000 southern California earthquakes between 1984 and 2002 by applying the source-specific station-term (SSST) method to existing P- and S-phase picks and a differential location method to about 208,000 events within similar-event clusters identified with waveform cross-correlation. The entire catalog is first relocated by using existing phase picks, a reference 1D velocity model, and the SSST method of Richards-Dinger and Shearer (2000). We also perform separate relocations of Imperial Valley events by using a velocity model more suited to this region. Next, we apply cluster analysis to the waveform cross-correlation output to identify similar-event clusters. We relocate earthquakes within each similar-event cluster by using the differential times alone, keeping the cluster centroid fixed to its initial SSST location. We estimate standard errors for the relative locations from the internal consistency of differential locations between individual event pairs; these errors are often as small as tens of meters. In many cases the relocated events within each similar-event cluster align in planar features suggestive of faults. We observe a surprising number of such faults at small scales that strike nearly perpendicular to the main seismicity trends. In general, the fine-scale details of the seismicity reveal a great deal of structural complexity in southern California fault systems.
This article has been cited by other articles:
|
|
 |
|
  N. M. Black and D. D. Jackson Probability of Multifault Rupture Bulletin of the Seismological Society of America, December 1, 2008; 98(6): 3017 - 3024. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Lin, P. M. Shearer, and E. Hauksson A Search for Temporal Variations in Station Terms in Southern California from 1984 to 2002 Bulletin of the Seismological Society of America, October 1, 2008; 98(5): 2118 - 2132. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. K. Lynch and K. W. Hudnut The Wister Mud Pot Lineament: Southeastward Extension or Abandoned Strand of the San Andreas Fault? Bulletin of the Seismological Society of America, August 1, 2008; 98(4): 1720 - 1729. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. P. Schaff Semiempirical Statistics of Correlation-Detector Performance Bulletin of the Seismological Society of America, June 1, 2008; 98(3): 1495 - 1507. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. P. Evangelidis, K. I. Konstantinou, N. S. Melis, M. Charalambakis, and G. N. Stavrakakis Waveform Relocation and Focal Mechanism Analysis of an Earthquake Swarm in Trichonis Lake, Western Greece Bulletin of the Seismological Society of America, April 1, 2008; 98(2): 804 - 811. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. Marsan and O. Lengline Extending Earthquakes' Reach Through Cascading Science, February 22, 2008; 319(5866): 1076 - 1079. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Plesch, J. H. Shaw, C. Benson, W. A. Bryant, S. Carena, M. Cooke, J. Dolan, G. Fuis, E. Gath, L. Grant, et al. Community Fault Model (CFM) for Southern California Bulletin of the Seismological Society of America, December 1, 2007; 97(6): 1793 - 1802. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Lin and P. Shearer Estimating Local Vp/Vs Ratios within Similar Earthquake Clusters Bulletin of the Seismological Society of America, April 1, 2007; 97(2): 379 - 388. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Pujol, K. Mueller, P. Shen, and V. Chitupolu High-Resolution 3D P-Wave Velocity Model for the East Ventura-San Fernando Basin, California, and Relocation of Events in the Northridge and San Fernando Aftershock Sequences Bulletin of the Seismological Society of America, December 1, 2006; 96(6): 2269 - 2280. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Hardebeck Homogeneity of Small-Scale Earthquake Faulting, Stress, and Fault Strength Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1675 - 1688. [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]
|
|
|
|
 |
|
 G. Lin and P. Shearer The COMPLOC Earthquake Location Package Seismological Research Letters, July 1, 2006; 77(4): 440 - 444. [Full Text] [PDF]
|
|
|
|
|
|
G. Lin, P. Shearer, and Y. Fialko Obtaining Absolute Locations for Quarry Seismicity Using Remote Sensing Data Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 722 - 728. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. P. Schaff and F. Waldhauser Waveform Cross-Correlation-Based Differential Travel-Time Measurements at the Northern California Seismic Network Bulletin of the Seismological Society of America, December 1, 2005; 95(6): 2446 - 2461. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Hauksson and P. Shearer Southern California Hypocenter Relocation with Waveform Cross-Correlation, Part 1: Results Using the Double-Difference Method Bulletin of the Seismological Society of America, June 1, 2005; 95(3): 896 - 903. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
