SPATIAL DISTRIBUTION FEATURES OF VELOCITY RESPONSES OF MW=8.0 EARTHQUAKE -CASE STUDY IN THE 2003 TOKACHI-OKI EARTHQUAKE-
The 2003 Tokachi-oki earthquake, a large (Mw=8.0) inter-plate earthquake, is the first earthquake with a magnitude of 8 after the nation wide high-density strong-motion network was installed. We make the spatial distribution maps and attenuation relationships for velocity responses. The spatial distribution maps show different features depending on the period. The short period (T:natural period =0.1) sec map shows strong attenuation of the response at back-arc side of the volcanic front; this can be explained by the S-wave attenuation structure beneath the northern Japan. The long-period (T~10sec) maps and relations are in part controlled by the source effect and the deep subsurface structure.
Velocity Response Attenuation of Strong Ground Motion Subsurface Structure The 2003 Tokachi-oki Earthquake
Nobuo TAKAI Tsutomu SASATANI
Associate Professor, Faculty of Engineering, Hokkaido University, Sapporo. JAPAN Professor, Faculty of Engineering, Hokkaido University, Sapporo. JAPAN
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）