著者

植竹 富一

出版者

北海道大学大学院理学研究院自然史科学部門(地球物理学)

雑誌

北海道大学地球物理学研究報告 (ISSN:04393503)

巻号頁・発行日

no.73, pp.49-55, 2010-03

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A deep(H=374 km)earthquake of Mj=6.7 occurred in Kyoto-Oki region on July 16, 2007. Broad-band velocity ground motions during this event were observed at many thermal power stations in the Tokyo bay area. Waveforms observed at the stations of the east side of the Tokyo bay show longer duration than those at the west side of the bay. The apparent frequencies of later arrivals are lower than those of S-wave parts. Velocity waveforms observed in the mountain area and in the bedrock of the basin have short duration and no significant later arrivals. This suggests that the later arrivals were excited by the Kanto basin.