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dc.contributor.authorMiyazaki, Shin'ichi  Concept link
dc.contributor.authorSegall, Paul  Concept link
dc.contributor.authorMcGuire, Jeffrey J.  Concept link
dc.contributor.authorKato, Teruyuki  Concept link
dc.contributor.authorHatanaka, Yuki  Concept link
dc.date.accessioned2010-06-16T18:30:32Z
dc.date.available2010-06-16T18:30:32Z
dc.date.issued2006-03-23
dc.identifier.citationJournal of Geophysical Research 111 (2006): B03409en_US
dc.identifier.urihttps://hdl.handle.net/1912/3657
dc.descriptionAuthor Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 111 (2006): B03409, doi:10.1029/2004JB003426.en_US
dc.description.abstractWe investigate an ongoing silent thrust event in the Tokai seismic gap along the Suruga-Nankai Trough, central Japan. Prior to the event, continuous GPS data from April 1996 to the end of 1999 show that this region displaced ∼2 cm/yr to the northwest relative to the landward plate. The GPS time series show an abrupt change in rate in mid-June 2000 that continues as of mid-2005. We model this transient deformation, which we refer to as the Tokai slow thrust slip event, as caused by slip on the interface between the Philippine Sea and Amurian plates. The spatial and temporal distribution of slip rate is estimated with Kalman filter based inversion methods. Our inversions reveal two slow subevents. The first initiated in late June 2000 slightly before the Miyake-jima eruption. The locus of slip then propagated southeast in the second half of 2000, with maximum slip rates of about 15 cm/yr through 2001. A second locus of slip initiated to the northeast in early 2001. The depth of the slip zone is about 25 km, which may correspond to the transition zone from a seismogenic to a freely sliding zone. The cumulative moment magnitude of the slow slip event up to November 2002 is M w ∼ 6.8. We calculate shear stress changes on the plate interface from the slip histories. Stress change as a function of slip rate shows trajectories similar to that inferred for high-speed ruptures; however, the maximum velocity is 8 orders of magnitude less than in normal earthquakes.en_US
dc.description.sponsorshipPart of this study is supported by JSPS Postdoctral Fellowships for Research Abroad.en_US
dc.format.mimetypeapplication/pdf
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dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2004JB003426
dc.subjectCrustal deformationen_US
dc.subjectGPSen_US
dc.subjectSlow slip eventen_US
dc.subjectTokaien_US
dc.subjectTransient deformationen_US
dc.titleSpatial and temporal evolution of stress and slip rate during the 2000 Tokai slow earthquakeen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2004JB003426


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