Seismicity characteristics before the 2003 Chengkung, Taiwan, earthquake

被引：34

作者：

Wu, Yih-Min ^{[1
]}

Chen, Chien-Chih ^{[2
,3
]}

Zhao, Li ^{[4
]}

Chang, Chien-Hsin ^{[5
]}

机构：

[1] Natl Taiwan Univ, Dept Geosci, Taipei 10617, Taiwan

[2] Natl Cent Univ, Dept Earth Sci, Jhongli 320, Taiwan

[3] Natl Cent Univ, Inst Geophys, Jhongli 320, Taiwan

[4] Acad Sinica, Inst Earth Sci, Taipei 115, Taiwan

[5] Cent Weather Bur, Taipei 100, Taiwan

来源：

TECTONOPHYSICS | 2008年 / 457卷 / 3-4期

关键词：

Earthquake; Seismicity; Seismic quiescence; b-values; Earthquake precursors;

D O I：

10.1016/j.tecto.2008.06.007

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We investigate the variations in seismicity pattern in the Taiwan region before the 2003 Chengkung, Taiwan, earthquake (M-w=6.8) by calculating the standard normal deviate of the Z-values and b-values from the Gutenberg-Richter relation. The Mogi donut-shaped variations in the seismicity can be identified in the Z-value map surrounding the Chengkung earthquake source region. Noticeable decreases in the b-values have also been found around the mainshock region before the Chengkung event. The relatively low-seismicity rate and the decrease in the b-values may be the precursory phenomena associated with the quiescence in overall seismicity and the activation of moderate-sized events occurred around the mainshock region before the Chengkung event. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

引用

页码：177 / 182

页数：6

共 34 条

[1]

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[2] Relocation of the 1999 Chi-Chi earthquake in Taiwan [J].