The Distribution of Strong Ground Motion from the 2001 Geiyo Earthquake and the Deep Underground Structure

• Koketsu Kazuki

  Earthquake Research Institute, University of Tokyo

• Furumura Takashi

  Earthquake Research Institute, University of Tokyo

Bibliographic Information

Other Title

• 2001年芸予地震の強震動分布と深部地下構造
• 2001ネン ゲイヨ ジシン ノ キョウシンドウ ブンプ ト シンブ チカ コウゾウ

Abstract

The significant attenuation of seismic motion in the west of the 2001 Geiyo earthquake is inferred from strong motion distributions, observed seismograms and their spectra. Since this attenuation is identified even in the distribution of borehole motions, that is assumed to arise in a deeper part like the mantle wedge. If we assume a low-Q zone in the mantle wedge, a strong motion simulation with Qs = 20-30 can reproduce the observations. This zone may be related to dehydration of the Philippine sea plate.

Journal

• Zisin (Journal of the Seismological Society of Japan. 2nd ser.)

  Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 55 (2), 97-105, 2002

  SEISMOLOGICAL SOCIETY OF JAPAN

Keywords

• 2001 Geiyo earthquake
• Strong motion distribution
• Deep underground structure

Details

• CRID: 1390001204305811328
• NII Article ID: 10010429048
• NII Book ID: AN00305741
• DOI: 10.4294/zisin1948.55.2_97
• ISSN: 18839029
• ISSN: 2186599X
• ISSN: 00371114
• NDL BIB ID: 6561671
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6561671
• Web Site: https://www.jstage.jst.go.jp/article/zisin1948/55/2/55_2_97/_pdf
• Data Source:
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  • NDL
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  • CiNii Articles
• Abstract License Flag: Disallowed