An attempt to detect mass movement associated with large volcanic eruptions (VEI 4 or higher) using satellite gravity data

DOI
  • Mitsui Yuta
    Faculty of Science, Shizuoka University
  • Konagai Shun
    Formerly at Graduate School of Science and Technology, Shizuoka University

Bibliographic Information

Other Title
  • 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

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Description

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.

Journal

Details 詳細情報について

  • CRID
    1390290095032024576
  • NII Article ID
    130008118514
  • NII Book ID
    AN00103190
  • DOI
    10.51053/shizuoka.47.0_51
  • ISSN
    24367184
    03886298
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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