伊豆半島東方沖の群発地震の特性と1989年の手石海丘の噴火 Earthquake Swarms off the East Coast of the Izu Peninsula and Their Relation to the 1989 Eruption of Teishi Knoll Volcano

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Earthquake swarms which have frequently occurred off the east coast of the Izu Peninsula since 1978 are investigated, and the relationships between the swarms and the submarine volcanic eruption at Teisi Knoll in 1989 are discussed. The results are summarized as follows: 1) Shapes of epicentral areas of the earthquake swarms can be classified into the following two types, Type I and Type II. The former is an ellipse elongated NE-SW; the latler, an eilipse elongated approximately NW-SE. The swarms in the early years are of Type I, and those in the later stage (in particular, since 1984), for the most part, are of Type II.2) The largest earthquakes in the respective swarms for Type I are located along a straight line in the NE-SW direction, and those for Type II, along a curve line in the E-W to NW-SE directions. These two lines are probably indicative of active tectonic lines. 3) The epicentral areas for Type I and Type II, migrate periodically with a recurrece time of 6-7 years along the tectonic line in the NE-SW direction, and with a recurrence time of about 3.7 years along the tectonic line in the E-W to NW-SE directions, respectively. 4) Teisi Knoll where the submarine volcanic eruption took place on July 13, 1989, is situated in the northwestern part of the tectonic line trending E-W to NW-SE. The eruption was triggerd by the largest shock in the swarm which occurred around the northwestern end of the line.

収録刊行物

  • 火山

    火山 37(1), 1-8, 1992

    特定非営利活動法人 日本火山学会

参考文献:  16件中 1-16件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    110003040987
  • NII書誌ID(NCID)
    AN10512786
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0453-4360
  • NDL 記事登録ID
    3779991
  • NDL 刊行物分類
    ME15;ME41
  • NDL 雑誌分類
    ZM44(科学技術--地球科学--海洋・陸水・火山)
  • NDL 請求記号
    Z15-101
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  J-STAGE 
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