Volcanic eruption volume flux estimations from very long period infrasound signals

Taishi Yamada, Hiroshi Aoyama, Takeshi Nishimura, Masato Iguchi, Muhamad Hendrasto

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We examine very long period infrasonic signals accompanying volcanic eruptions near active vents at Lokon-Empung volcano in Indonesia, Aso, Kuchinoerabujima, and Kirishima volcanoes in Japan. The excitation of the very long period pulse is associated with an explosion, the emerging of an eruption column, and a pyroclastic density current. We model the excitation of the infrasound pulse, assuming a monopole source, to quantify the volume flux and cumulative volume of erupting material. The infrasound-derived volume flux and cumulative volume can be less than half of the video-derived results. A largely positive correlation can be seen between the infrasound-derived volume flux and the maximum eruption column height. Therefore, our result suggests that the analysis of very long period volcanic infrasound pulses can be helpful in estimating the maximum eruption column height.

Original languageEnglish
Pages (from-to)143-151
Number of pages9
JournalGeophysical Research Letters
Volume44
Issue number1
DOIs
Publication statusPublished - 2017 Jan 16

Keywords

  • VLP
  • eruption column
  • magma flux
  • monopole source
  • volcanic infrasound
  • volume flux

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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