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首页> 外文期刊>Terra Nova >Coseismic Coulomb stress changes imparted by the 1996 Minahasa Mw7.9 earthquake on the 2018 Palu Mw7.5 earthquake and expected seismicity rate changes
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Coseismic Coulomb stress changes imparted by the 1996 Minahasa Mw7.9 earthquake on the 2018 Palu Mw7.5 earthquake and expected seismicity rate changes

机译:1996年Minahasa MW7.9地震赋予了电影发电池群压力变化2018年PALU MW7.5地震和预期地震率变化

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摘要

The Mw7.5 Palu earthquake that occurred on September 28, 2018, in Indonesia caused much damage to the city of Palu. Preliminary investigations indicated that the Palu-Koro Fault (PKF) hosted this damaging event. We calculated the seismicity before and after the 1996 Minahasa Mw7.9 earthquake and found that the seismicity on the PKF was enhanced after this earthquake. The earlier earthquake added Coulomb stress changes (increment CFS) to the seismogenic fault plane. We calculated the increment CFS produced by the Palu earthquake on a specified received nodal plane; the results suggest that many aftershocks occurred in the region of increased increment CFS. This region was consistent with the region of increased seismicity. The increment CFS on neighbouring faults increased, and up to 55.282 bar of stress was observed on the PKF. Furthermore, we calculated the expected seismicity rate and found that it will require similar to 50 years to recover to its original level.
机译:MW7.5 Palu地震发生在2018年9月28日,印度尼西亚对帕卢市造成了很大损害。 初步调查表明,Palu-Koro断层(PKF)托管了这一破坏性事件。 我们在1996年Minahasa MW7.9地震之前和之后计算了地震性,发现这种地震后PKF的地震性增强。 较早的地震增加了库仑应力改变(增量CFS)到发震断层平面。 我们计算了Palu地震所产生的增量CFS在指定的核节面上产生的CFS; 结果表明,许多余震发生在增加增量CFS的区域中。 该地区与增加地震性的区域一致。 在PKF上增加了相邻故障的增量CFS,高达55.282栏应力。 此外,我们计算了预期的地震率,发现它需要类似于50年的时间来恢复到原始水平。

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  • 来源
    《Terra Nova》 |2020年第1期|共9页
  • 作者单位

    China Earthquake Adm Inst Seismol Key Lab Earthquake Geodesy Wuhan Hubei Peoples R China;

    China Earthquake Adm Inst Seismol Key Lab Earthquake Geodesy Wuhan Hubei Peoples R China;

    China Earthquake Adm Inst Seismol Key Lab Earthquake Geodesy Wuhan Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 天文学、地球科学;
  • 关键词

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