Earthquake location using a 3D velocity model : an example in Sichuan Province, China
Name
48615256-MIT.pdf
Description
Full printable version
Size
6.3 MB
Format
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Checksum (MD5)
a1454540e08ea664f4b682793b535597
Author(s)
Vincent, Carolynn E. (Carolynn Elizabeth), 1976-
Advisor(s)
M. Nafi Toksöz.
Alternative Title
Earthquake location using a three dimensional velocity model : an example in Sichuan Province, China
Date Issued
2000
Publisher
Massachusetts Institute of Technology
Abstract
We investigate the benefits of applying three-dimensional velocity models to seismic event location. We develop a technique for three-dimensional seismic event location, utilizing a finite difference method for travel time calculation and a grid search method for location. We apply this technique to the location of three events in Sichuan Province, China, an area of complex deformation and scattered seismicity. The lateral differences between published event locations and those obtained using this three dimensional technique are between 6.2 and 12.8 km, suggesting that the relocation of a larger number of events may refine our understanding of deformation in this region. The locations using the three-dimensional velocity model compare favorably with locations using a one-dimensional model, returning location depths consistent with the geology of the area and showing smaller location variability when using a jackknifing technique.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2000.
Includes bibliographical references (leaves 50-52).
Subjects
Earth, Atmospheric, and Planetary Sciences.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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reproduction or distribution in any format is prohibited without written
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