Aftershock observation of the 1995 Hyogo-ken Nanbu earthquake in Awaji Island: strong motion and broad band observation

T. Okumura, H. Takenaka, S. Suzuki, T. Sasatani, M. Furumura, S. Saito, T. Matsushima, T. Furumura

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

The 1995 Hyogo-ken Nanbu earthquake occurred on January 17 1995. The maximum seismic intensity was seven in Kobe city and a part of Awaji island. The aftershocks were observed at three stations in Awaji island using three strong-motion seismometers and a broad-band seismometer from January 19 to April 4. During this period, 89 events were oberved. In these events, nine events were observed at all of the three stations. Among the nine events, three events were analysed using integration of velocity in the time domain and amplitude spectrum of S-wave for 5 seconds. Amplitude spectral ratios of two events occurring in Kobe side for 20 seconds from P-wave arrival, for 20 seconds from S-wave arrival, and S-wave part for 5 seconds were also analysed. Those amplitude spectra showed predominant frequency around 1-4 Hz for IWY and ABK stations, but TSM predominant frequency around 4-7 Hz. The spectral ratio shows 3-10 times amplification, around 1-2 Hz and 4-7 Hz for TSM/IWY, and around 0.9-2 Hz and 4-7 Hz for ABK/IWY. For TSM/IWY, 2-5 times attenuation was observed around 2-3 Hz.

本文言語英語
ページ(範囲)103-123
ページ数21
ジャーナルScience Reports - Kyushu University, Department of Geology
19
1
出版ステータス出版済み - 12 1 1995

All Science Journal Classification (ASJC) codes

  • 地球惑星科学(全般)
  • 環境科学(全般)

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