Static stress triggering effects related with <i>M</i><sub>s</sub>8.0 Wenchuan earthquake

Hang ZHU; Xueze WEN

doi:10.1007/s12583-010-0001-8

Volume 21 Issue 1

Feb 2010

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Journal of Earth Science > 2010 > 21(1): 32-41.

Hang ZHU, Xueze WEN. Static stress triggering effects related with Ms8.0 Wenchuan earthquake. Journal of Earth Science, 2010, 21(1): 32-41. doi: 10.1007/s12583-010-0001-8

Citation:

Hang ZHU, Xueze WEN. Static stress triggering effects related with M_s8.0 Wenchuan earthquake. Journal of Earth Science, 2010, 21(1): 32-41. doi: 10.1007/s12583-010-0001-8

Hang ZHU, Xueze WEN. Static stress triggering effects related with Ms8.0 Wenchuan earthquake. Journal of Earth Science, 2010, 21(1): 32-41. doi: 10.1007/s12583-010-0001-8

Citation:

Hang ZHU, Xueze WEN. Static stress triggering effects related with M_s8.0 Wenchuan earthquake. Journal of Earth Science, 2010, 21(1): 32-41. doi: 10.1007/s12583-010-0001-8

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Static stress triggering effects related with M_s8.0 Wenchuan earthquake

doi: 10.1007/s12583-010-0001-8

Hang ZHU^{1, 2
,
,},
Xueze WEN^{1, 2, 3}

1.
State Key Laboratory of Earthquake Dynamics, Beijing, 100029, China
2.
Earthquake Administration of Sichuan Province, Chengdu, 610041, China
3.
Institute of Earthquake Science, China Earthquake Administration, Beijing, 100036, China

Funds:

the Open Fund Project of State Key Laboratory of Earthquake Dynamics LED2008B01

More Information

Corresponding author: Hang ZHU, zhuhang@eqsc.gov.cn
Received Date: 10 Aug 2009
Accepted Date: 25 Nov 2009
Publish Date: 01 Feb 2010

Abstract

Abstract

In this article,firstly,we calculated and analyzed the patterns of Coulomb stress changes induced by a sequence of strong earthquakes that occurred in Songpan (松潘),Sichuan (四川) Province in 1973 and 1976, and discovered that the M_s8.0 Wenchuan (6C76;川) earthquake of 2008 was epicentered in a relevant Coulomb stress triggering zone. This suggests that the Coulomb stress on the middle and southern segments of the Longmenshan (龙门山) fault zone increased after the Songpan sequence of strong earthquakes,and the stress increment might cause the 2008 Wenchuan earthquake having already occurred somewhat ahead of time. Further,we calculated and analyzed Coulomb stress changes coinduced by both the Songpan sequence and the M_s8.0 Wenchuan mainshock. The result shows that the M_s6.4 Qingchuan (青川) earthquake of May 25,2008 on the northeastern segment of the Longmenshan fault zone was triggered by the Wenchuan mainshock,and that the southwestern segment of the fault zone is also in the stress triggering zone. Besides,the Maoxian (茂县)-Wenchuan fault (i.e.,the back-range fault of the Longmenshan fault zone),which extends parallel to the seismogenic fault of the Wenchuan earthquake,is in a shadow zone of the Coulomb stress changes,and therefore,its potential hazard for producing a strong or large earthquake in the near future could be reduced relatively.
- 2008 Wenchuan earthquake,
- Songpan strong earthquake sequence,
- static stress triggering,
- Coulomb failure stress change,
- seismic hazard

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References(22)

References

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