• ISSN 2097-1893
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主喜马拉雅逆冲断裂的横向变化控制2015年尼泊尔廓尔喀地震的破裂长度

L. Bai S. L. Klemperer J. Mori M. S. Karplus L. Ding H. B. Liu G. H. Li B. W. Song S. Dhakal 江勇 李国辉 白玲

引用本文: 江勇, 李国辉 译. 2020. 主喜马拉雅逆冲断裂的横向变化控制2015年尼泊尔廓尔喀地震的破裂长度. 世界地震译丛. 51(1):22-32. doi:10.16738/j.cnki.issn.1003-3238.202001002
L. Bai, S. L. Klemperer, J.Mori, et al. 2019. Lateral variation of the Main Himalayan Thrust controls the rupture length of the 2015 Gorkha earthquake in Nepal. Sci.Adv.5:eaav0723.doi:10.1126/sciadv.aav0723

主喜马拉雅逆冲断裂的横向变化控制2015年尼泊尔廓尔喀地震的破裂长度

doi: 10.16738/j.cnki.issn.1003-3238.202001002
基金项目: 

本译文由国家自然科学基金项目“2015年尼泊尔地震相关地质灾害的地震学成因”(编号:41761144076)资助

Lateral variation of the Main Himalayan Thrust controls the rupture length of the 2015 Gorkha earthquake in Nepal

  • 摘要: 喜马拉雅造山带大地震活动频繁,影响着长达2 500km的人口密集地带。2015年尼泊尔廓尔喀地震(MW7.8)发生在主喜马拉雅逆冲断裂(MHT)上,为陆陆碰撞带断裂活动特征的研究提供了最直接的观测资料。我们使用覆盖整个余震区的近震台站地震波形数据对MHT进行研究。结果表明,MHT沿构造走向呈现清晰的横向变化,在主震区存在低喜马拉雅断坡,而在余震区东部变得更深且倾角更加平缓。余震区以东MHT界面上的地震波速表现为高速异常,可能与印度板块基底隆起的俯冲结构有关,余震区以西同样存在地震波速异常。MHT的总体形态结构变化控制了廓尔喀地震的破裂长度。

     

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