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Title
  • Significance of Electromagnetic Surveys at Active Volcanoes : Toward Evaluating the Imminence of Wet Eruptions
Creator

Hashimoto, Takeshi

Kanda, Wataru

Morita, Yuichi

Hayakawa, Midori

Tanaka, Ryo

Aoyama, Hiroshi

Uyeshima, Makoto

Rights
Subject
  • Other Kuttara volcano
  • Other magnetotellurics
  • Other wet eruptions
  • Other unrest phenomena
  • NDC 453
Description
Other
  • The detection capability of various anomalous phenomena preceding volcanic eruptions has considerably progressed as the geophysical monitoring networks have become denser and multi-disciplinary. However, current eruption forecasting techniques, from a practical perspective, still have much scope for improvement because they largely depend on empirical techniques. In the past decade, three-dimensional modeling based on the electromagnetic sounding methods such as magnetotellurics (MT) have become a practical choice, and its recent applications to active volcanic fields has revealed certain common features among volcanoes. Information about the resistivity structure, especially in ‘wet’ volcanic fields, is useful for the provisional screening of the eruption potential from the viewpoint of the subsurface structure, and, thus, may contribute to the evaluation of eruption imminence in a broad sense. In this study, for evaluation purposes, we present the roles and possible further applications of the subsurface resistivity structure studies by demonstrating the preliminary results and interpretations of an MT survey that we performed in the Kuttara Volcanic Group, northern Japan.
PublisherFuji Technology Press
Date Issued 2019-06-01
Languageeng
NIItypejournal article
VersiontypeAM
Identifier URI http://hdl.handle.net/2115/74568
Relation
  • isIdenticalTo DOI https://doi.org/10.20965/jdr.2019.p0580
Journal
    • ISSN 1881-2473
    • ISSN 1883-8030
    • Journal of Disaster Research
    14(4), 580-591
File
Oaidate2019-10-08T04:43:59Z