Interplate coupling in and around the rupture area of the 2011 Tohoku earthquake (M9.0) before its occurrence based on terrestrial and seafloor geodetic observations

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

In this study, we investigated the state of interplate coupling between the subducting Pacific plate and continental plate around the rupture area of the 2011 Tohoku Earthquake (M9.0) based on seafloor geodetic data as well as terrestrial GPS data obtained before the M9 earthquake in order to evaluate the potential for further seismic activity from the viewpoint of the slip deficit budget balance. Due to the difference between the site spatial densities on land and the seafloor observation networks, it was necessary to utilize a covariance matrix with non-zero off-diagonal components in the inversion to estimate the interplate coupling distribution on the plate interface and to account for the correlations among the observation errors for components and stations. We validated the implementation of the assumed covariance matrix by performing a computational test and we then applied the method to actual geodetic data obtained before the 2011 Tohoku Earthquake. The results demonstrate the persistence of the interplate coupling in the area of a very large coseismic slip near the Japan Trench.

本文言語English
ホスト出版物のタイトルInternational Symposium on Geodesy for Earthquake and Natural Hazards (GENAH) - Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH)
編集者Manabu Hashimoto
出版社Springer Verlag
ページ11-18
ページ数8
ISBN(印刷版)9783319397672
DOI
出版ステータスPublished - 2017
イベントProceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014 - Matsushima, Japan
継続期間: 2014 7 222014 7 26

出版物シリーズ

名前International Association of Geodesy Symposia
145
ISSN(印刷版)0939-9585

Other

OtherProceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014
国/地域Japan
CityMatsushima
Period14/7/2214/7/26

ASJC Scopus subject areas

  • 地球科学におけるコンピュータ
  • 地球物理学

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