HR: 1340h
AN: S33A-0314    [Abstracts]
TI: Daylight Imaging by Aftershocks of Tottori-Seibu Earthquake in Japan
AU: * Matsuoka, T
EM: matsuoka@kumst.kyoto-u.ac.jp
AF: Kyouto Univ., Yoshida Honmachi Sakyo-ku, Kyoto, 606-8501 Japan
AU: Tanaka, M
EM: m_tanaka@earth.kumst.kyoto-u.ac.jp
AF: Kyouto Univ., Yoshida Honmachi Sakyo-ku, Kyoto, 606-8501 Japan
AU: Shiraishi, K
EM: skazuya@earth.kumst.kyoto-u.ac.jp
AF: Kyouto Univ., Yoshida Honmachi Sakyo-ku, Kyoto, 606-8501 Japan
AU: Narahara, S
EM: nara@jgi.co.jp
AF: JGI Inc., 5-21 1-tyome Otsuka Bunkyo-ku, Tokyo, 112-0012 Japan
AU: Abe, S
EM: shintaro@abiko.dentan.or.jp
AF: CRIEPI, 1646 Abiko Abiko-shi, Chiba, 270-1166 Japan
AB: In the daylight imaging, the general relations between reflection and transmission response were derived by Wapenaar et al (2004). Using this relations, reflection seismic data can be reconstructed by cross-correlation of transmitted seismic data. In our study, we applied this technique to imaging the subsurface structures using passive seismic data of aftershocks. We observed 22 data sets of aftershocks with 255 receivers along the road. Then pseudo shot gathers were synthesized at each receiver location. We can process and analyze the reconstructed data based on the conventional processing of seismic reflection survey. Finally we obtained the stacked image with which we could interpret subsurface structures as well as using seismic reflection method with Vibroseis. When we observe aftershocks, densely distributed receivers can informs us detailed subsurface structures, and widely distributed receivers can do deep and wide subsurface structures. In addition, this technique can be easily applied to other seismological events and it is useful for geophysical survey using the continuous monitoring system. So this technique will become more and more important in the future.
DE: 0935 Seismic methods (3025, 7294)
SC: Seismology [S]
MN: Fall Meeting 2005