Velocity structure of the uppermost mantle beneath East Asia from Pn tomography and its dynamic implications

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dc.citation.firstpage290en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleJournal of Geophysical Research: Solid Earthen_US
dc.citation.lastpage301en_US
dc.citation.volumeNumber118en_US
dc.contributor.authorWang, Suyunen_US
dc.contributor.authorNiu, Fenglinen_US
dc.contributor.authorZhang, Guominen_US
dc.date.accessioned2016-01-28T17:15:40Zen_US
dc.date.available2016-01-28T17:15:40Zen_US
dc.date.issued2013en_US
dc.description.abstract[1] East Asia is one of the most tectonically active regions on Earth's surface due to the collision from the India plate and the suctions induced by the subduction of the Pacific and Philippine plates. To better understand the complicated deformation and active seismicity of the area, we conducted a Pn traveltime tomography to estimate the compressive wave speed of the uppermost mantle beneath East Asia. We collected a total of 296,334 Pn arrivals recorded by 1354 stations from 27,777 earthquakes in a rectangular area from 60°E to 145°E in longitude, 15°N to 60°N in latitude. The data set was carefully integrated from three different catalogs after examining potential systematic biases in the catalogs. The inversion results revealed a large-scale velocity perturbation in the study area. Pn velocity in the region west to ~108°E is approximately 10% higher than that in the east. In each region, stable blocks tend to have highPn velocity while the boundary regions, which show a high level of seismicity and surface deformation, appear to have low Pn velocity. We further computed the Benioff strain rate in the two regions and found it correlates negatively with the averaged Pn velocity. Our observations here suggest that Pn velocity, which is predominantly determined by Moho temperature, is a good indicator of lithosphere strength.en_US
dc.identifier.citationWang, Suyun, Niu, Fenglin and Zhang, Guomin. "Velocity structure of the uppermost mantle beneath East Asia from Pn tomography and its dynamic implications." <i>Journal of Geophysical Research: Solid Earth,</i> 118, no. 1 (2013) American Geophysical Union: 290-301. http://dx.doi.org/10.1002/jgrb.50085.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/jgrb.50085en_US
dc.identifier.urihttps://hdl.handle.net/1911/88224en_US
dc.language.isoengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordPn Arrivalsen_US
dc.subject.keywordPn Tomographyen_US
dc.subject.keywordIntraplate Seismicityen_US
dc.subject.keywordLithospheric Strengthen_US
dc.subject.keywordEast Asiaen_US
dc.titleVelocity structure of the uppermost mantle beneath East Asia from Pn tomography and its dynamic implicationsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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