The Distribution of Strong Ground Motion from the 2001 Geiyo Earthquake and the Deep Underground Structure
The Distribution of Strong Ground Motion from the 2001 Geiyo Earthquake and the Deep Underground Structure
复制标题
2001年艺叶地震强地震动分布与深层地下结构
DOI:
10.4294/zisin1948.55.2_97
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
T. Furumura
中科院分区:
文献类型:
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作者:
K. Koketsu;T. Furumura
Kazuki KOKETSU and Takashi FURUMURA Earthquake Research Institute, Universityof Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0032, Japan (Received December 13, 2001; Accepted June 14, 2002) The significant attenuation of seismic motion in the west of the 2001 Geiyo earthquake is inferrec from strong motion distributions, observed seismograms and their spectra. Since this attenuation identified even in the distribution of borehole motions, that is assumed to arise in a deeper part like the mantle wedge. If we assume a low-Q zone in the mantle wedge, a strong motion simulation with Qs= 20-30 can reproduce the observations. This zone may be related to dehydration of the Philippine see plate.