Coseismic slip model of offshore moderate interplate earthquakes on March 9, 2011 in Tohoku using tsunami waveforms

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• 作者：Tatsuya Kubota^a ; ^{tatsuya.kubota.r6@dc.tohoku.ac.jp} ; Ryota Hino^a ; ^{hino@m.tohoku.ac.jp} ; Daisuke Inazu^b ; ¹ ; ^{inazud@oa.u-tokyo.ac.jp} ; ^{inazud@m.kaiyodai.ac.jp} ; Yoshihiro Ito^c ; ^{ito.yoshihiro.4w@kyoto-u.ac.jp} ; Takeshi Iinuma^d ; ^{iinuma@jamstec.go.jp} ; Yusaku Ohta^a ; ^{yusaku.ohta.d2@tohoku.ac.jp} ; Syuichi Suzuki^a ; ^{syuichi.suzuki.a1@tohoku.ac.jp} ; Kensuke Suzuki^d ; ^{kensukes@jamstec.go.jp}
• 关键词：2011 Tohoku-Oki earthquake ; foreshock ; tsunami ; subduction zone ; seafloor observations
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：458
• 期：Complete
• 页码：241-251
• 全文大小：1523 K
• 卷排序：458

文摘

Finite fault models of two large 2011 Tohoku earthquake foreshocks are presented. Nearest-field tsunami data inversion revealed coseismic slip of the foreshocks. South-migrating seismicity suggests aseismic slip triggered the Tohoku earthquake. Foreshock coseismic and postseismic slip areas show complementary distributions. A 1981 M7 earthquake asperity ruptured during the largest foreshock in 2011.