HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Crustal magma pathway beneath Aso caldera inferred from three-dimensional electrical resistivity structure

Files in This Item:
Hata_et_al_2016_GRL.pdf3.36 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Crustal magma pathway beneath Aso caldera inferred from three-dimensional electrical resistivity structure
Authors: Hata, Maki Browse this author
Takakura, Shinichi Browse this author
Matsushima, Nobuo Browse this author
Hashimoto, Takeshi Browse this author →KAKEN DB
Utsugi, Mitsuru Browse this author
Issue Date: 28-Oct-2016
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 43
Issue: 20
Start Page: 10,720
End Page: 10,727
Publisher DOI: 10.1002/2016GL070315
Abstract: At Naka-dake cone, Aso caldera, Japan, volcanic activity is raised cyclically, an example of which was a phreatomagmatic eruption in September 2015. Using a three-dimensional model of electrical resistivity, we identify a magma pathway from a series of northward dipping conductive anomalies in the upper crust beneath the caldera. Our resistivity model was created from magnetotelluric measurements conducted in November–December 2015; thus, it provides the latest information about magma reservoir geometry beneath the caldera. The center of the conductive anomalies shifts from the north of Naka-dake at depths >10 km toward Naka-dake, along with a decrease in anomaly depths. The melt fraction is estimated at 13–15% at ~2 km depth. Moreover, these anomalies are spatially correlated with the locations of earthquake clusters, which are distributed within resistive blocks on the conductive anomalies in the northwest of Naka-dake but distributed at the resistive sides of resistivity boundaries in the northeast.
Rights: An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union. Hata, M., S. Takakura, N. Matsushima, T. Hashimoto, and M. Utsugi, (2016), Crustal magma pathway beneath Asocaldera inferred from three-dimensional electrical resistivity structure, Geophys. Res. Lett., 43, 10,720–10,727, doi:10.1002/2016GL070315. To view the published open abstract, go to and enter the DOI.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 橋本 武志

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University