• journal_title：Bulletin of the Seismological Society of America
• Contributor：Ruey-Der Hwang ; Jeen-Hwa Wang ; Bor-Shouh Huang ; Kou-Cheng Chen ; Win-Gee Huang ; Tao-Ming Chang ; Hung-Chie Chiu ; Chu-Chuan Peter Tsai
• Publisher：Seismological Society of America
• Date：2001-
• Format：text/html
• Language：en
• Identifier：10.1785/0120000708
• journal_abbrev：Bulletin of the Seismological Society of America
• issn：0037-1106
• volume：91
• issue：5
• firstpage：1158
• section：Articles

The apparent stress and stress drop of the Chi-Chi, Taiwan, earthquake are estimated from near-field seismograms. The estimated apparent stress and stress drop for the southern part of the fault are about 100 bars lower than those for the northern part. The estimated ratio E_s/M₀ also suggests that there is a higher dynamic stress drop in the northern part than in the southern one. This indicates the transformation of a higher percentage of strain energy into the seismic-wave energy in the northern part than in the southern part. Based on a parameter proposed by Ramón Zúñiga (1993), we propose that the stress model of frictional overshoot can interpret the rupture of the Chelungpu fault, on which the Chi-Chi, Taiwan, earthquake occurred.