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dc.contributor.authorYang, Hongfeng  Concept link
dc.contributor.authorLiu, Yajing  Concept link
dc.contributor.authorLin, Jian  Concept link
dc.date.accessioned2013-02-06T19:34:20Z
dc.date.available2014-10-22T08:57:22Z
dc.date.issued2012-12-19
dc.identifier.citationGeophysical Research Letters 39 (2012): L24302en_US
dc.identifier.urihttps://hdl.handle.net/1912/5755
dc.descriptionAuthor Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 39 (2012): L24302, doi:10.1029/2012GL053892.en_US
dc.description.abstractSubducted seamounts have been linked to interplate earthquakes, but their specific effects on earthquake mechanism remain controversial. A key question is under what conditions a subducted seamount will generate or stop megathrust earthquakes. Here we show results from numerical experiments in the framework of rate- and state-dependent friction law in which a seamount is characterized as a patch of elevated effective normal stress on the thrust interface. We find that whether subducted seamounts generate or impede megathrust earthquakes depends critically on their relative locations to the earthquake nucleation zone defined by depth-variable friction parameters. A seamount may act as a rupture barrier and such barrier effect is most prominent when the seamount sits at an intermediate range of the seamount-to-trench distances (20–100% of the nucleation-zone-to-trench distance). Moreover, we observe that seamount-induced barriers can turn into asperities on which megathrust earthquakes can nucleate at shallow depths and rupture the entire seismogenic zone. These results suggest that a strong barrier patch may not necessarily reduce the maximum size of earthquakes. Instead, the barrier could experience large coseismic slip when it is ruptured.en_US
dc.description.sponsorshipThis work is supported by the NSF Grant EAR-1015221 and WHOI Deep Ocean Exploration Institute awards 27071150 and 25051162.en_US
dc.format.mimetypeapplication/msword
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/postscript
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dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2012GL053892
dc.subjectBarrieren_US
dc.subjectMegathrust earthquakeen_US
dc.subjectRupture propagationen_US
dc.subjectSeamounten_US
dc.titleEffects of subducted seamounts on megathrust earthquake nucleation and rupture propagationen_US
dc.typeArticleen_US
dc.description.embargo2013-06-19en_US
dc.identifier.doi10.1029/2012GL053892


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