The trial which presupposes the surface ground motion using underground seismographs

Shin'ichi Sakai; Shigeki Nakagawa; Naoshi Hirata

Presentation information

Oral

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

[S-SS33] Special Project for Reducing Vulnerability for Urban Mega Earthquake Disasters

Mon. May 23, 2016 3:30 PM - 5:00 PM 105 (1F)

Convener:*Shin'ichi Sakai(Earthquake Research Institute, University of Tokyo), Naoshi Hirata(Earthquake Research Institute, the University of Tokyo), Hiroshi Sato(Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo), Kenji Satake(Earthquake Research Institute, University of Tokyo), Hiroshi Tsuruoka(Earthquake Research Institute, Tokyo Univ.), Chair:Akinori Hashima(Earthquake Research Institute, The University of Tokyo), Jun Muragishi(Earthquake Research Institute, University of Tokyo.)

3:30 PM - 3:45 PM

[SSS33-07] The trial which presupposes the surface ground motion using underground seismographs

*Shin'ichi Sakai¹, Shigeki Nakagawa¹, Naoshi Hirata¹ (1.Earthquake Research Institute, University of Tokyo)

Keywords:Metropolitan area, urban earthquake, intensity

We have been constructing an ultra dense seismic observation network; Metropolitan Seismometer Observation Network; MeSO-net. MeSO-net consists of 296 seismic stations. The signals from seismometers are sampled 200 Hz by a 24-bit analog to digital converter at the bottom of 20m-borehole. The surface ground motion differs from the waveform observed at the underground. Then, we tried presumption of the surface ground motion using an underground seismograph. The present study is supported by two Special Projects for Earthquake Disaster Mitigation in Tokyo Metropolitan Area and reducing vulnerability for urban mega earthquake disasters from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.