Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2022, Vol. 58 ›› Issue (3): 481-487.DOI: 10.13209/j.0479-8023.2022.023

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Discussion about Near Trench Triggering during 2012 Mw 7.2 Indian-Ocean Strike-Slip Earthquake

JIA Bo, YUE Han†   

  1. School of Earth and Space Sciences, Peking University, Beijing 100871
  • Received:2021-04-07 Revised:2021-05-13 Online:2022-05-20 Published:2022-05-20
  • Contact: YUE Han, E-mail: yue.han(at)pku.edu.cn

关于2012年Mw 7.2苏门答腊地震近场动态触发的讨论

贾博, 岳汉†   

  1. 北京大学地球与空间科学学院, 北京 100871
  • 通讯作者: 岳汉, E-mail: yue.han(at)pku.edu.cn
  • 基金资助:
    国家自然科学基金(42021003)资助 

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Abstract:

Whether the aftershocks near the trench were triggered by 2012 Indian Ocean Mw 7.2 earthquake was discussed by using teleseismic P-wave records. According to the assumption of the direct and indirect trigger mechanism of regional water waves, the line-source model and the two-point source model were proposed. The inversion results show that the line-source model based on the direct trigger mechanism was better than the two-point model on the waveform fitting, and the aftershocks near the trench were not triggered during 2012 Indian Ocean earthquake.

Key words: dynamic trigger, two-point source inversion, line-source inversion, back-projection

摘要：

利用远震P波观测数据, 研究2012年印度洋Mw 7.2地震是否近场触发海沟附近余震的问题。根据区域化水波直接触发机制和间接激发机制的假设, 提出线性断层反演模型和双点源反演模型。远震P波数据反演结果表明, 基于区域化水波直接触发机制的线性断层模型对波形的拟合效果更好, 并且2012年印度洋地震没有触发海沟附近的余震。

关键词: 动态触发, 双点源反演, 线性断层反演, 反投影 

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