2012年苏门答腊<i>Mw</i>8.6地震成因及与周边大震关系

薛艳; 程佳; 刘杰; 杨文

doi:10.3799/dqkx.2014.046

Volume 39 Issue 4

Apr. 2014

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Xue Yan, Cheng Jia, Liu Jie, Yang Wen, 2014. Geodynamic Mechanism of the 2012 Sumatra Mw8.6 Earthquake and Relationships with Other Great Shocks in Surrounding Areas. Earth Science, 39(4): 481-491. doi: 10.3799/dqkx.2014.046

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Xue Yan, Cheng Jia, Liu Jie, Yang Wen, 2014. Geodynamic Mechanism of the 2012 Sumatra Mw8.6 Earthquake and Relationships with Other Great Shocks in Surrounding Areas. Earth Science, 39(4): 481-491. doi: 10.3799/dqkx.2014.046

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Geodynamic Mechanism of the 2012 Sumatra Mw8.6 Earthquake and Relationships with Other Great Shocks in Surrounding Areas

doi: 10.3799/dqkx.2014.046

China Earthquake Networks Center, Beijing 100045, China

Received Date: 2013-06-24
Publish Date: 2014-04-15

Abstract

Abstract

The geodynamic mechanism of the great April 11, 2012, Mw8.6 earthquake off the west coast of the northern Sumatra, Indonesia is the difference of the crust northward movements in the west of Sunda trench. Furthermore, the results of static stress calculation show that the shock was triggered by the 2004 devastating Mw9.1 shock and the 2005 event of Mw8.6. There was no earthquake with Mw≥7.0 occurred in the seismogenic fault of the 2012 Sumatra shock from 1900 to 2011. In addition, a seismic gap with Mw≥5.0 was formed around the focal region and the gap was disturbed after the 2004 Sumatra earthquake occurred. Six years, four and a half years and three months before the great 2012 event, there were three groups of foreshocks respectively, and the Mw7.2 event, the direct pre-earthquake, occurred three months prior to the Mw8.6 shock, is the most significant one in the three groups of foreshocks.
- earthquakes,
- stress triggering,
- seismogenic gap,
- foreshock,
- geodynamics,
- Sumatra

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References(39)

References

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Geodynamic Mechanism of the 2012 Sumatra Mw8.6 Earthquake and Relationships with Other Great Shocks in Surrounding Areas

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