Coseismic slip distribution of the 2011 off the Pacific coast of Tohoku Earthquake (M 9.0) estimated based on GPS data—Was the asperity in Miyagi-oki ruptured?

We investigated the crustal deformation associated with the 2011 off the Pacific coast of Tohoku Earthquake ( M 9.0) that occurred on March 11, 2011, along the plate boundary off Tohoku district, northeastern Japan, based on dense GPS observation. Coseismic displacements due to this event were appli...

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Veröffentlicht in:Earth, planets, and space planets, and space, 2011-01, Vol.63 (7), p.643-648
Hauptverfasser: Iinuma, Takeshi, Ohzono, Mako, Ohta, Yusaku, Miura, Satoshi
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container_issue 7
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creator Iinuma, Takeshi
Ohzono, Mako
Ohta, Yusaku
Miura, Satoshi
description We investigated the crustal deformation associated with the 2011 off the Pacific coast of Tohoku Earthquake ( M 9.0) that occurred on March 11, 2011, along the plate boundary off Tohoku district, northeastern Japan, based on dense GPS observation. Coseismic displacements due to this event were applied to estimate the causal interplate slip by means of a geodetic inversion analysis. The major slip area is located around the asperities of the 1981 Miyagi-oki ( M 7.2) and 2003 Fukushima-oki ( M 6.8) earthquakes and the maximum slip is estimated as being up to 35 m. The estimated slip distribution suggests that the asperities of the Miyagi-oki earthquake in 1978 ( M 7.4) that had not been ruptured during the Miyagi-oki earthquake in 2005 were ruptured as a part of the main shock fault of the 2011 off the Pacific coast of Tohoku Earthquake.
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source Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection; Springer Nature OA/Free Journals; SpringerLink Journals - AutoHoldings
subjects Earth and Environmental Science
Earth Sciences
Geology
Geophysics/Geodesy
Letter
title Coseismic slip distribution of the 2011 off the Pacific coast of Tohoku Earthquake (M 9.0) estimated based on GPS data—Was the asperity in Miyagi-oki ruptured?
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