@inproceedings{0a349fd3e39e4d33999d9658b67174ff,
title = "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",
abstract = "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.",
keywords = "2011 Tohoku Earthquake, Acoustic ranging, Covariance, GPS, Interplate coupling, Seafloor geodesy",
author = "Takeshi Iinuma and Ryota Hino and Motoyuki Kido and Yusaku Ohta and Satoshi Miura",
note = "Funding Information: The authors would like to thank the Japan Nuclear Energy Safety Organization, the Geospatial Information Authority of Japan, and the National Astronomical Observatory of Japan for providing GPS data. The present study was supported through the Intramural Research Grant for Special Project Researches from International Research Institute of Disaster Science, Tohoku University. Three anonymous reviewers provided thoughtful comments, which improved the manuscript. The figures were created using GMT software (Wessel and Smith ). Publisher Copyright: {\textcopyright} Springer International Publishing Switzerland 2015.; Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014 ; Conference date: 22-07-2014 Through 26-07-2014",
year = "2017",
doi = "10.1007/1345_2015_48",
language = "English",
isbn = "9783319397672",
series = "International Association of Geodesy Symposia",
publisher = "Springer Verlag",
pages = "11--18",
editor = "Manabu Hashimoto",
booktitle = "International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH) - Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH)",
address = "Germany",
}