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Radiographic visualization of magma dynamics in an erupting volcano

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  • Hiroyuki K. M. Tanaka

    (Earthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku)

  • Taro Kusagaya

    (Earthquake Research Institute, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku)

  • Hiroshi Shinohara

    (National Institute of Advanced Industrial Science and Technology, Umezono 1-1-1, Tsukuba)

Abstract

Radiographic imaging of magma dynamics in a volcanic conduit provides detailed information about ascent and descent of magma, the magma flow rate, the conduit diameter and inflation and deflation of magma due to volatile expansion and release. Here we report the first radiographic observation of the ascent and descent of magma along a conduit utilizing atmospheric (cosmic ray) muons (muography) with dynamic radiographic imaging. Time sequential radiographic images show that the top of the magma column ascends right beneath the crater floor through which the eruption column was observed. In addition to the visualization of this magma inflation, we report a sequence of images that show magma descending. We further propose that the monitoring of temporal variations in the gas volume fraction of magma as well as its position in a conduit can be used to support existing eruption prediction procedures.

Suggested Citation

  • Hiroyuki K. M. Tanaka & Taro Kusagaya & Hiroshi Shinohara, 2014. "Radiographic visualization of magma dynamics in an erupting volcano," Nature Communications, Nature, vol. 5(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4381
    DOI: 10.1038/ncomms4381
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