HR: 0800h
AN: S21B-0214 [Abstracts]
TI: Source Modeling For Simulating Broad-band Strong Ground Motions During Recent Large Earthquakes In
Japan
AU: * Kamae, K
EM: kamae@kuca.rri.kyoto-u.ac.jp
AF: Research Reactor Institute, Kyoto University, Asashiro-nishi Kumatori-cho, Osaka, 590-0494
Japan
AU: Kawabe, H
EM: kawabe@rri.kyoto-u.ac.jp
AF: Research Reactor Institute, Kyoto University, Asashiro-nishi Kumatori-cho, Osaka, 590-0494
Japan
AU: Kawabe, H
EM: kawabe@rri.kyoto-u.ac.jp
AF: Tobishima Corporation, Kimagase, Noda-shi, Chiba, 270-0222
Japan
AU: Ikeda, T
EM: Takaaki_Ikeda@tobishima.co.jp
AF: Tobishima Corporation, Kimagase, Noda-shi, Chiba, 270-0222
Japan
AU: Miwa, S
S21B-0214
AF: Tobishima Corporation, Kimagase, Noda-shi, Chiba, 270-0222
Japan
AU: Irikura, K
EM: irikura@dpri.dpri01.kyoto-u.ac.jp
AF: Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto, 606-8501
Japan
AB:
Strong ground motions are related with slip heterogeneity inside the source rather than the entire rupture area from the
waveform inversion results of source rupture processes using strong motion data during large earthquakes. Such asperities are
defined as regions that have two times slip as large as the average slip over the rupture area (Somerville et al, 1999).
After the Kobe earthquake, we have examined that broad-band strong motion generation areas approximately coincide with the
asperity areas based on the source inversion results by the forward modeling using the empirical Green_fs function method. In
this study, we proposed the source models composed of asperities, comparing simulated and observed broad-band ground motions
for recent large earthquakes, such as the 1995 Kobe, 2000 Torrori-Seibu, 2003 Tokachi-oki, 2004 Niigata-Chuetsu, 2005
Fukuoka, 1978, 2005 Miyagi-oki in Japan and 1999 Kocaeli in Turkey, 1999 Chi-chi in Taiwan and other earthquakes.
Resultantly, we showed the estimated asperity sizes are consistent with those estimated from the empirical scaling
relationship by Somerville et al, (1999) although the matching of the locations is not complete.
DE: 7200 SEISMOLOGY
DE: 7212 Earthquake ground motions and engineering seismology
SC: Seismology [S]
MN: Fall Meeting 2005