有限要素法による十勝岳62-I I火口周辺の局所的地殻変動の予備解析

• 奥山 哲

• 高橋 浩晃

書誌事項

タイトル別名

• Preliminary FEM analysis of the local deformation around the 62-II eruptive vent at Mt. Tokachi
• ユウゲン ヨウソホウ ニ ヨル トカチダケ 62-Ⅱ カコウ シュウヘン ノ キョクショテキ チカク ヘンドウ ノ ヨビ カイセキ

抄録

We present the result of our preliminary FEM analysis of local deformation at Mt. Tokachi. Since 2006, displacement of several cm/yr has been observed by GPS measurement and SAR interferometry at 62-II eruptive vent which was formed by the eruptive event in 1962. The spatial scale of the deformation observed by SAR interferometry is around 2 km. This indicates that the deformation source is at the depth of less than 1 km, supporting that the deformation source is the hydrothermal activity rather than the magma chamber. As a preliminary analysis, we assumed spheroidal pressure source beneath the 62-II vent and simulated the surface deformation to observe the relation between the surface deformation and source depth/shape. We then compared the simulated deformation and SAR interferometry result to find that prolate spheroid (flattening of 0.8) at the depth of 200 m best explains the observation.

収録刊行物

• 北海道大学地球物理学研究報告

  北海道大学地球物理学研究報告 78 11-18, 2015-03-19

  北海道大学大学院理学研究院

キーワード

• 450

詳細情報

• CRID: 1390572174747765632
• NII論文ID: 120005572446
• NII書誌ID: AN0008976X
• DOI: 10.14943/gbhu.78.11
• HANDLE: 2115/58237
• NDL書誌ID: 026336133
• ISSN: 04393503
• Web Site: http://id.ndl.go.jp/bib/026336133
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026336133
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可