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dc.contributor.authorYang, Hongfeng  Concept link
dc.contributor.authorLiu, Yajing  Concept link
dc.contributor.authorLin, Jian  Concept link
dc.date.accessioned2014-08-06T19:37:06Z
dc.date.available2014-08-06T19:37:06Z
dc.date.issued2013-05-30
dc.identifier.citationGeophysical Research Letters 40 (2013): 2011–2016en_US
dc.identifier.urihttps://hdl.handle.net/1912/6788
dc.descriptionAuthor Posting. © American Geophysical Union, 2013. 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 40 (2013): 2011–2016, doi:10.1002/grl.50509.en_US
dc.description.abstractWe have numerically simulated dynamic ruptures along a “slip-weakening” megathrust fault with a subducted seamount of realistic geometry, demonstrating that seamounts can act as a barrier to earthquake ruptures. Such barrier effect is calculated to be stronger for increased seamount normal stress relative to the ambient level, for larger seamount height-to-width ratio, and for shorter seamount-to-nucleation distance. As the seamount height increases from 0 to 40% of its basal width, the required increase in the effective normal stress on the seamount to stop ruptures drops by as much as ~20%. We further demonstrate that when a seamount is subducted adjacent to the earthquake nucleation zone, coseismic ruptures can be stopped even if the seamount has a lower effective normal stress than the ambient level. These results indicate that subducted seamounts may stop earthquake ruptures for a wide range of seamount normal stress conditions, including the case of the thrust fault being lubricated by seamount-top fluid-rich sediments, as suggested from observations in the Japan and Sunda Trenches.en_US
dc.description.sponsorshipThis work was supported by NSF grant EAR-1015221 and WHOI Deep Ocean Exploration Institute awards 27071150 and 25051162.en_US
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/grl.50509
dc.subjectDynamic ruptureen_US
dc.subjectSeamount geometryen_US
dc.subjectBarrieren_US
dc.titleGeometrical effects of a subducted seamount on stopping megathrust rupturesen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/grl.50509


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