Air-Fall Ash from the Main Crater of Asama Volcano on August 7, 2019, and its Water-Soluble Components | Zendy

Muga Yaguchi | Zendy; Akihiko Terada | Zendy; Yasuo Ogawa | Zendy

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Air-Fall Ash from the Main Crater of Asama Volcano on August 7, 2019, and its Water-Soluble Components

Author(s) -

Muga Yaguchi,

Akihiko Terada,

Yasuo Ogawa

Publication year - 2020

Publication title -

journal of disaster research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.332

H-Index - 18

eISSN - 1883-8030

pISSN - 1881-2473

DOI - 10.20965/jdr.2020.p0053

Subject(s) - volcano , phreatic eruption , impact crater , volcanic ash , phreatic , geology , fumarole , crater lake , geochemistry , seismology , mineralogy , magma , groundwater , geotechnical engineering , astrobiology , aquifer , physics

We collected volcanic ash immediately following the eruption of Mt. Asama on August 7, 2019, observed the characteristics of ash particles, and analyzed the water-soluble components. The volcanic ash consisted mostly of altered fragments, and no clear evidence of essential materials was found. The volcanic ash contained large amounts of water-soluble components, Cl and SO 4 at concentrations of 8,710 mg/kg and 49,100 mg/kg, respectively. These results indicate that this eruption was caused by the phreatic explosion and that part of the volcanic edifice of Mt. Asama was fractured and emitted.

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