Central shutdown and surrounding activation of aftershocks from megathrust earthquake stress transfer
Central shutdown and surrounding activation of aftershocks from megathrust earthquake stress transfer
复制标题
特大逆冲地震应力传递导致余震的中心关闭和周围激活
DOI:
10.1038/s41561-022-00954-x
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发表时间:
2022
影响因子:
18.3
通讯作者:
Stein, Ross S.
中科院分区:
文献类型:
--
作者:
Toda, Shinji;Stein, Ross S.
Megathrust earthquakes release and transfer stress that has accumulated over hundreds of years, leading to large aftershocks that can be highly destructive. Understanding the spatiotemporal pattern of megathrust aftershocks is key to mitigating the seismic hazard. However, conflicting observations show aftershocks concentrated either along the rupture surface itself, along its periphery or well beyond it, and they can persist for a few years to decades. Here we present aftershock data following the four largest megathrust earthquakes since 1960, focusing on the change in seismicity rate following the best-recorded 2011 Tohoku earthquake, which shows an initially high aftershock rate on the rupture surface that quickly shuts down, while a zone up to ten times larger forms a ring of enhanced seismicity around it. We find that the aftershock pattern of Tohoku and the three other megathrusts can be explained by rate and state Coulomb stress transfer. We suggest that the shutdown in seismicity in the rupture zone may persist for centuries, leaving seismicity gaps that can be used to identify prehistoric megathrust events. In contrast, the seismicity of the surrounding area decays over 4–6 decades, increasing the seismic hazard after a megathrust earthquake.
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影响因子:
3
作者:
J. C. Neo;Yihe Huang;D. Yao;S. Wei
通讯作者:
J. C. Neo;Yihe Huang;D. Yao;S. Wei
DOI:
10.1029/jb094ib01p00665
发表时间:
1989-01-10
期刊:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
影响因子:
--
作者:
CIFUENTES, IL
通讯作者:
CIFUENTES, IL
影响因子:
3
作者:
B. MacInnes;R. Weiss;J. Bourgeois;T. Pinegina
通讯作者:
B. MacInnes;R. Weiss;J. Bourgeois;T. Pinegina
影响因子:
18.3
作者:
S. Toda;R. Stein;G. Beroza;D. Marsan
通讯作者:
S. Toda;R. Stein;G. Beroza;D. Marsan
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
E. Okal;C. Synolakis
通讯作者:
C. Synolakis