COULOMB STRESS CHANGES CAUSED BY WENCHUAN EARTHQUAKE AND ITS INFLUENCE ON SEISMIC ACTIVITY IN THE ADJACENT AREAS

WANG Lian-jie; ZHOU Chun-jing; SUN Dong-sheng; WU Zhen-han; WANG Wei

Volume 14 Issue 3

Sep. 2008

Turn off MathJax

Article Contents

Abstract

References

Article Navigation > Journal of Geomechanics > 2008 > 14(3): 193-200

WANG Lian-jie, ZHOU Chun-jing, SUN Dong-sheng, et al., 2008. COULOMB STRESS CHANGES CAUSED BY WENCHUAN EARTHQUAKE AND ITS INFLUENCE ON SEISMIC ACTIVITY IN THE ADJACENT AREAS. Journal of Geomechanics, 14 (3): 193-200.

Citation:

PDF( 925 KB)

COULOMB STRESS CHANGES CAUSED BY WENCHUAN EARTHQUAKE AND ITS INFLUENCE ON SEISMIC ACTIVITY IN THE ADJACENT AREAS

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

More Information

Abstract

Abstract

On 12 May 2008, M8.0 Wenchuan earthquake occurred along the Longmenshan fault belt in Sichuan Province of China, causing enormous losses and thousands death, and the rearrangement of crustal stress commonly leads to damaging aftershocks.Coulomb stress changes caused by the Wenchuan earthquake are calculated and earthquake activity is evaluated using finite element method for some faults around the area.Results show that Coulomb stress displays a greater changes in northeast part of Longmeshan fault belt, including Beichuan, Qingchuan, Ningqiang areas and so on.Most of aftershocks of Wenchuan earthquake occurred in the area where the Coulomb stress change is increased. Coulomb stress gets weaker in most parts of Xianshueihe fault (b-1, b-2, b-4)except for some parts (b-3).It shows an increase to northwest of Chengdu, but a decrease to southeast of Chengdu.Coulomb stress increases can bring faults to failure, with delays ranging from seconds to decades.
- Wenchuan earthquake,
- Coulomb stress change,
- Longmenshan fault,
- finite element

FullText(HTML)

References(17)

References

[1]	张永双, 雷伟志, 石菊松, 等.四川5.12地震次生地质灾害的基本特征初析[J].地质力学学报, 2008, 14(2):109~116. doi: 10.3969/j.issn.1006-6616.2008.02.002
[2]	Harris R A.Introduction to special section:Stress triggers, stress shadows, and implications for seismic hazard[J].GeophysRes, 1998, 103:24347~24358. doi: 10.1029-98JB01576/
[3]	Stein R S, Barka A A, Dieterich J H.Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering[J].Geophys J Int, 1997, 128:594~604. doi: 10.1111/gji.1997.128.issue-3
[4]	Deng J, Sykes L R.Evolution of the stress field in southern California and triggering of moderate-size earthquakes:A 2002 yearperspective[J].J Geophys Res, 1997, 102:9859~9886. doi: 10.1029/96JB03897
[5]	Reasenberg P A, Simpson R W.Response of regional seismicity to the static stress change produced by the Loma Prieta earthquake[J].Science, 1992, 255:1687~1690. doi: 10.1126/science.255.5052.1687
[6]	Hardebeck J L, Nazareth J J, Hauksson E.The static stress change triggering model:Constraints from two southern Californiaaftershock sequences[J].J Geophys Res, 1998, 98:4461~4472.
[7]	Toda S.Stress transferred by the 1995M_W=6.9 Kobe, Japan, shock:Effect on aftershocks and future earthquake probabilities[J].J Geophys Res, 1998, 103:24543~24565. doi: 10.1029/98JB00765
[8]	刘桂萍, 傅征祥.1973年炉霍大地震(M_S=7.6)最大余震(M_S=6.3)的库仑破裂应力触发[J].中国地震, 2002, 18(2):175~182. doi: 10.3969/j.issn.1001-4683.2002.02.007
[9]	Parsons T.Global Omori law decay of triggered earthquakes:Large aftershocks outside the classical aftershock zone[J].GeophysRes, 2002, 107:doi: 10.1029/2001JB000646.
[10]	King G C P, Stein R S, Lin J.Static stress changes and the triggering of earthquakes[J].Bull Seism Soc Amer, 1994, 84:935~953. http://d.old.wanfangdata.com.cn/Periodical/dqkx-e201001004
[11]	Stein R S, Barka A A, Dieterich J H.Progressive failure on the North Anatolian fault since 1939 by earthquake static stresstriggering[J].Geophys J Int, 1997, 128:594~604. doi: 10.1111/gji.1997.128.issue-3
[12]	Okada Y.Internal deformation due to shear and tensile faults in a half2space[J].Bull Seism Soc Amer, 1992, 82:1018-1040.
[13]	王琼, 聂晓红, 唐丽华.北天山西段中强地震应力触发作用初步研究[J].内陆地震, 2007, 21(2):119~128. doi: 10.3969/j.issn.1001-8956.2007.02.004
[14]	郝平, 傅征祥, 田勤俭, 等.昆仑山口西8.1级地震强余震库仑破裂应力触发研究[J].地震学报, 2004, 26(1):30~37. doi: 10.3321/j.issn:0253-3782.2004.01.004
[15]	万永革, 沈正康, 曾跃华, 等.青藏高原东北部的库仑应力积累演化对大地震发生的影响[J].地震学报, 2007, 29(2):116~129. http://d.old.wanfangdata.com.cn/Periodical/dizhen200702001
[16]	叶裕明, 刘春山, 沈火明, 等.ANSYS土木工程应用[M].北京:中国水利电力出版社, 2005.
[17]	邓起东, 冉勇康, 杨晓平, 等.中国活动构造图[M].北京:中国地震出版社, 2007.