1995年奄美大島近海地震の断層パラメターと津波の発生 Fault Parameters and Tsunami Generation of the 1995 Amami-Oshima-Kinkai Earthquake

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We estimated the fault parameters of the 1995 Amami-Oshima-Kinkai Earthquake, which occurred along the Ryukyu trench with a normal fault mechanism. The earthquake generated larger tsunamis than expected from its magnitude (<I>M</I><SUB>JMA</SUB> 6.7), about 3 m on nearby Kikai-jima Island. Among six fault models we considered, the low angle fault dipping to the east (model LA) best explains the observed data such as the aftershock distribution and the horizontal coseismic movement of Amami-Oshima Island inferred from GPS measurements. The fault is 60 km long, 30 km wide, 10-20km deep and the average slip on the fault is 1 m. Tsunami numerical computations indicate that the tsunami amplitudes, particularly at far-field, are insensitive to the fault parameters, suggesting that the large tsunami was not due to unusual source process. Numerical computations also show that the bathymetry between the source and Kikai-jima Island is responsible to the large tsunamis observed on the island.

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  • 地學雜誌  

    地學雜誌 106(4), 546-556, 1997-08-25 

    Tokyo Geographical Society

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各種コード

  • NII論文ID(NAID)
    10002236298
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    4283311
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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