Tuning the deep velocity structure model by 1-D simulation of long-period S- waves
Tuning the deep velocity structure model by 1-D simulation of long-period S- waves
复制标题
通过长周期横波的一维模拟调整深层速度结构模型
DOI:
10.1190/segj092009-001.12
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
N. Takai
中科院分区:
文献类型:
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作者:
Y. Dhakal;T. Sasatani;N. Takai
Deep sedimentary layers above the seismic basement (Swave velocity ~ 3 km/s) greatly control the amplitude and duration of long-period strong ground motions in large basin areas. Recently, National Research Institute for Earth Science and Disaster Prevention (NIED) has developed velocity structure models in several regions of Japan as part of seismic hazard mapping projects in Japan. The NIED velocity structures in large basin areas need to be adjusted based on the observed features of earthquake records for the prediction of strong ground motions. In general, direct S-wave at a basin site from 3D simulation for a deep basin structure is essentially the same as that from 1-D simulation for a flat layer structure just beneath the site. According to this fact, we propose an improvement in tuning the deep velocity structure with 1-D simulation of long-period S-waves. The observed long-period S-waveform is compared with the synthetic long-period S-waveform from 1-D simulation assuming a tentative flat layer structure just beneath the site. In this comparison, it is important to select an appropriate band-width of the bandpass filter based on the S-wave amplification factors. This process is repeated until both S-waveforms fit reasonably. We apply this tuning method to the NIED model of the Tokachi basin located in the eastern Hokkaido, Japan.
影响因子:
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作者:
S. Aoi;R. Honda;N. Morikawa;H. Sekiguchi;Haruhiko Suzuki;Y. Hayakawa;T. Kunugi;H. Fujiwara
通讯作者:
S. Aoi;R. Honda;N. Morikawa;H. Sekiguchi;Haruhiko Suzuki;Y. Hayakawa;T. Kunugi;H. Fujiwara
DOI:
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发表时间:
2009
期刊:
Tectonophysics 472
影响因子:
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作者:
Koketsu;K.;H.Miyake;Afnimar;Y.Tanaka
通讯作者:
Y.Tanaka
DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
Choong Geun Lee;V. G. Moshnyaga and K. Hashimoto;宮田康治
通讯作者:
宮田康治