大規模火山噴火（VEI 4以上）に伴う質量移動を衛星重力データから検出する試み

DOI

書誌事項

タイトル別名
  • An attempt to detect mass movement associated with large volcanic eruptions (VEI 4 or higher) using satellite gravity data

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説明

GRACE (Gravity Recovery and Climate Experiment) mission had clarified global time-variable gravity fields since 2002. The time-variable gravity fields represent spatiotemporal mass redistribution on the Earth. Using GRACE level-3 data provided by CNES/GRGS, we attempt to detect signals of mass movement related to volcanic eruptions. We focus on the gravity data for 13 volcanoes where large (VEI 4 or higher) eruptions occurred, and perform a regression analysis with linear, annual, and semiannual components. We find that only Icelandic volcanoes have notable signals of positive changes in the linear trends of gravity (Eyjafjallajökull and Grimsvötn) and negative offset (Eyjafjallajökull) associated with the eruptions. These signals can be attributed to responses of surrounding glacial system to the eruptions rather than mass movement by the eruption themselves. In addition, small but significant signals have also been detected in other volcanoes, but their interpretation is still difficult.

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詳細情報 詳細情報について

  • CRID
    1390290095032024576
  • NII論文ID
    130008118514
  • NII書誌ID
    AN00103190
  • DOI
    10.51053/shizuoka.47.0_51
  • ISSN
    24367184
    03886298
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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