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Data Files from "3D Velocity Structure around the Source Area of the 1999 Chi-Chi, Taiwan, Earthquake: Before and After the Mainshock"

Institute of Seismology
National Chung Cheng University
Ming-Hsing, Chia-yi, Taiwan
(C.-H.C., W.-H.W.)
Department of Earth Science
University of Southern California
Los Angeles, Californiay
(T.-L.T.)

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Our study seeks to obtain a more detailed 3D velocity structure for the region surrounding the Chi-Chi source volume, both before and after the Chi-Chi earthquake. Through tomographic inversion, we have computed 3D V_p and V_p/V_s models using the high-quality data set from local earthquakes as recorded by the Taiwan Central Weather Bureau Seismographic Network (CWBSN).

We have selected 760 Chi-Chi aftershocks with 12,568 P- and 9,915 S-wave arrival times that are used in this study. In order to examine whether the large Chi-Chi earthquake sequence has changed the crustal properties, we have used another data set selected from the CWBSN database from 1993 to 1999. This includes arrival times of 22,500 P- and 14,460 S-wave arrival times from 975 events . . . [Full Text of this Article]