宮城県・鳴瀬川流域周辺の強震観測点における常時微動H/Vスペクトルとサイト増幅特性

Microtremor H/V Spectrum Ratio and Site Amplification Factor at Seismic Observation Stations around the Naruse River basin, Miyagi Prefecture

Hata Yoshiya

Ichii Koji

Sakai Hisakazu

Nozu Atsushi

広島大学大学院工学研究科研究報告

Bulletin of the Graduate School of Engineering, Hiroshima University

The 2011 off the Pacific coast of Tohoku, Japan, earthquake caused serious damage to engineering structures, not only due to tsunamis but also due to strong ground motions. The serious damage of Naruse River dike due to the 2011 main shock is reported. In this study, we carried out the microtremor measurement, and calculated microtremor H/V spectral ratio in 13 seismic observation stations around the Naruse River basin. Furthermore, we computed site amplification factors in the seismic observation stations based on the temporary aftershock observation records. The calculated H/V spectral ratio and site amplification factors will contribute to the strong motion estimation of the damaged Naruse River basin and clarification of damage mechanisms in the future study.

The 2011 off the Pacific coast of Tohoku Earthquake

seismic observation station

microtremor measurement

site amplification factor

Earth sciences. Geology [ 450 ]

jpn

広島大学大学院工学研究科

[ISSN] 1347-7218

[NCID] AA11700032