Temporal changes of seismic velocity in Tokai area revealed by the observation of  the Toki seismic ACROSS signals

Takahiro KUNITOMO; Koshun YAMAOKA; Toshiki WATANABE

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-SS Seismology

[S-SS26] Seismic wave propagation: Theory and Application

Tue. May 26, 2015 4:15 PM - 5:45 PM 103 (1F)

Convener:*Tatsuhiko Saito(National Research Institute for Earth Science and Disaster Prevention), Hisashi Nakahara(Solid Earth Physics Laboratory, Department of Geophysics, Graduate School of Science, Tohoku University), Jun Matsushima(School of Engineering, The University of Tokyo), Kiwamu Nishida(Earthquake Research Institute, University of Tokyo), Kazuya Shiraishi(JGI, Inc.), Chair:Takuto Maeda(Earthquake Research Institute, the University of Tokyo), Kaoru Sawazaki(National Research Institute for Earth Science and Disaster Prevention)

5:00 PM - 5:15 PM

[SSS26-22] Temporal changes of seismic velocity in Tokai area revealed by the observation of the Toki seismic ACROSS signals

*Takahiro KUNITOMO¹, Koshun YAMAOKA¹, Toshiki WATANABE² (1.Graduate School of Environmental Studies, Nagoya Univ., 2.ERI, Univ. of Tokyo)

Keywords:seismic ACROSS, seismic velocity change, travel time change, Hi-net

We report on the travel time changes of the seismic ACROSS signals observed by Hi-net stations in Tokai region from 2008 to 2014, especially after the Tohoku Earthquake (March. 11, 2011, M9.0),and overview seismic velocity changes in the earth's crust in the Tokai region for 7 years.

Acknowledgement: Hi-net data are provided by National Research Institute for Earth Science and Disaster Prevention, Japan (NIED). Toki ACROSS transmitting station is managed by Japan Atomic Energy Agency (JAEA).