2007年苏门答腊8.5级、 8.3级地震强余震库仑破裂应力触发研究

地震 ›› 2008, Vol. 28 ›› Issue (1): 40-46.

2007年苏门答腊8.5级、 8.3级地震强余震库仑破裂应力触发研究

周龙泉¹, 马宏生², 夏红³, 周俊杰⁴, 邵志刚²

1.中国地震台网中心, 北京 100043;
2.中国地震局地震预测研究所, 北京 100036;
3.中国地震应急搜救中心, 北京 100049;
4.河北工程大学资源学院, 河北邯郸 056038

收稿日期:2007-10-15 修回日期:2007-11-10 出版日期:2008-01-31 发布日期:2021-10-29
作者简介:周龙泉(1976-), 男, 江西南丰人, 博士, 主要从事地震层析成像和地震预测等研究。
基金资助:
国家科技支撑计划项目(2006BAC01B02-01-02)

Large aftershocks triggering by coulomb failure stress following the 2007 M_S8.5 and 8.3 Sumatra great earthquakes

ZHOU Long-quan¹, MA Hong-sheng², XIA Hong³, ZHOU Jun-jie⁴, SHAO Zhi-gang²

1. China Earthquake Networks Center, CEA, Beijing 100045;
2. Institute of Earthquake Science, CEA, Beijing 100036;
3. China Search and Rescue Center, CEA, Beijing 100049;
4. College of Natural Resource, Hebei University of Engineering, Handan 056038, China

Received:2007-10-15 Revised:2007-11-10 Online:2008-01-31 Published:2021-10-29

摘要/Abstract

摘要： 2007年9月12日印尼苏门答腊发生了8.5级地震, 9月13日其西北边又发生了8.3级地震, 震后在附近还发生了一系列6级以上强震。该文依次计算了苏门答腊8.5级地震后各次地震前其所在主破裂面的库仑破裂应力变化。结果表明, 2007年苏门答腊8.5级地震的后续强震都发生在库仑破裂应力显著增加区, 其应力变化值均大于0.01 MPa, 即后续强震可能都是被触发的。

关键词: 苏门答腊8.5级、 8.3级地震, 库仑破裂应力, 应力触发

Abstract: A series of large aftershocks with magnitude larger than 6.0 occurred after the Sumatra M_S8.5 earthquake (Sep.12, 2007). The change of Coulomb failure stress on aftershock focal depth produced by all the earthquakes before each aftershock is calculated. The results show that the large aftershocks of the 2007 M_S8.5 Sumatra earthquake occurred in areas of increscent stress, which is more than 0.01 MPa. Therefore, the aftershocks were probably triggered by the Coulomb failure stress change.

Key words: Sumatra M_S8.5 and 8.3 earthquakes, Coulomb failure stress, Stress triggering

中图分类号:

P315.7

周龙泉, 马宏生, 夏红, 周俊杰, 邵志刚. 2007年苏门答腊8.5级、 8.3级地震强余震库仑破裂应力触发研究[J]. 地震, 2008, 28(1): 40-46.

ZHOU Long-quan, MA Hong-sheng, XIA Hong, ZHOU Jun-jie, SHAO Zhi-gang. Large aftershocks triggering by coulomb failure stress following the 2007 M_S8.5 and 8.3 Sumatra great earthquakes[J]. EARTHQUAKE, 2008, 28(1): 40-46.

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