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JDR Vol.15 No.1 pp. 53-56
(2020)
doi: 10.20965/jdr.2020.p0053

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

Muga Yaguchi*,†, Akihiko Terada**, and Yasuo Ogawa**

*Volcanology Research Department, Meteorological Research Institute, Japan Meteorological Agency
1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan

†Corresponding author

**Volcanic Fluid Research Center, School of Science, Tokyo Institute of Technology, Tokyo, Japan

Received:
August 23, 2019
Accepted:
November 5, 2019
Published:
February 1, 2020
Creative Commons License
Keywords:
Mt. Asama volcano, volcanic ash, water-soluble components
Abstract

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 SO4 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.

Cite this article as:
M. Yaguchi, A. Terada, and Y. Ogawa, “Air-Fall Ash from the Main Crater of Asama Volcano on August 7, 2019, and its Water-Soluble Components,” J. Disaster Res., Vol.15 No.1, pp. 53-56, 2020.
Data files:
References
  1. [1] Japan Meteorological Agency, “Volcanic Warning (Near the crater),” https://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/volinfo/VJ20190807223000_306.html (in Japanese) [accessed August 14, 2019]
  2. [2] Japan Meteorological Agency, “Volcanic Activity of Asama Volcano (Sep.2000–Apr.2003),” Rep. Coord. Commit. Pred. Volc. Eruption, Vol.85, pp. 35-52, 2003 (in Japanese).
  3. [3] Japan Meteorological Agency, “Abstract of Volcanic Activities of Asama in 2004,” Rep. Coord. Commit. Pred. Volc. Eruption, Vol.89, pp. 11-23, 2005 (in Japanese).
  4. [4] Japan Meteorological Agency, “Volcanic Activity of Asamayama Volcano From June 2008 to October 2008,” Rep. Coord. Commit. Pred. Volc. Eruption, Vol.101, pp. 54-61, 2010 (in Japanese).
  5. [5] Japan Meteorological Agency, “Volcanic Activity of Asamayama Volcano (from October 2008 to February 2009),” Rep. Coord. Commit. Pred. Volc. Eruption, Vol.102, pp. 34-48, 2010 (in Japanese).
  6. [6] Japan Meteorological Agency, “Volcanic Activity of Asamayama Volcano (June 2015–October 15, 2015),” Rep. Coord. Commit. Pred. Volc. Eruption, Vol.122, pp. 108-127, 2015 (in Japanese).
  7. [7] Japan Meteorological Agency, “Descriptive Report of Volcanic Activity on Asama volcano (August 8, 2019 at 00:30),” https://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/monthly_v-act_doc/tokyo/19m08/201908080030_306.pdf, p. 5, 2019 (in Japanese).
  8. [8] K. Kazahaya, J. Hirabayashi, H. Mori, M. Odai, Y. Nakahori, K. Nogami, S. Nakada, H. Shinohara, and K. Uto, “Volcanic Gas Study of the 2000 Miyakejima Volcanic Activity: Degassing Environment Deduced from Adhered Gas Component on Ash and SO2 Emission Rate,” J. Geography, Vol.110, No.2, pp. 271-279, doi: 10.5026/jgeography.110.2_271, 2001 (in Japanese with English abstract).
  9. [9] A. Tomiya, I. Miyagi, H. Hoshizumi, T. Yamamoto, Y. Kawanabe, and H. Satoh, “Essential material of the March 31, 2000 eruption of Usu Volcano: Implication for the mechanism of the phreatomagmatic eruption,” Bull. Geol. Surv. Japan, Vol.52, No.4-5, pp. 215-229, doi: 10.9795/bullgsj.52.215, 2001 (in Japanese with English abstract).
  10. [10] T. Oikawa, T. Oba, A. Fujinawa, and H. Sasaki, “Geological study of phreatic eruptions” J. Geol. Soc. Japan, Vol.124, No.4, pp. 231-250, doi: 10.5575/geosoc.2017.0071, 2018 (in Japanese with English abstract).
  11. [11] M. Yaguchi, T. Ohba, N. Numanami, and R. Kawaguchi, “Constituent Mineral and Water-soluble Components of Volcanic Ash from the 2018 Eruption of Mt. Motoshirane of Kusatsu-Shirane Volcano, Japan,” J. Disaster Res., Vol.14, No.7, pp. 991-995, doi: 10.20965/jdr.2019.p0991, 2019.
  12. [12] Geographical Survey Institute of Japan, https://maps.gsi.go.jp/#13/36.387226/138.475542/&base=std&base_grayscale=1&ls=std%2C0.6%7Chillshademap%2C0.75&blend=1&disp=11&lcd=hillshademap&vs=c1j0h0k0l0u0t0z0r0s0m0f2&d=vl,2019 (in Japanese) [accessed August 14, 2019]
  13. [13] M. Yoshimoto, T. Shimano, S. Nakada, E. Koyama, H. Tsuji, A. Iida, M. Kurokawa, Y. Okayama, M. Nonaka, T. Kaneko, H. Hoshizumi, Y. Ishizuka, R. Furukawa, K. Nogami, S. Onizawa, K. Niihori, T. Sugimoto, and M. Nagai, “Mass Estimation and Characteristics of Ejecta from the 2004 Eruption of Asama Volcano,” Bull. Volcanol. Soc. Japan, Vol.50, No.6, pp. 519-533, doi: 10.18940/kazan.50.6_519, 2005 (in Japanese with English abstract).
  14. [14] Y. Suzuki, A. Furukawa, S. Nakada, T. Fujii, A. Watanabe, and E. Koyama, “Juvenile ash of an small eruption at Mt. Asama on August 10, 2008,” Programme and Abstracts Volcanol. Soc. Japan 2008, p. 106, doi: 10.18940/vsj.2008.0_106, 2008 (in Japanese).
  15. [15] K. Nogami, S. Onizawa, and J. Hirabayashi, “Geochemical Observation on the 2004 Eruption of Asama Volcano through Analysis of Water-soluble Components on the Ash,” Bull. Volcanol. Soc. Japan, Vol.53, No.2, pp. 69-77, doi: 10.18940/kazan.53.2_69, 2008 (in Japanese with English abstract).
  16. [16] J. Ossaka, K. Nogami, and J. Hirabayashi, “Water-soluble Components on Volcanic Ashes from Tokachi-dake Volcano, Hokkaido, Japan during the 1988–1989 Eruption,” Bull. Volcanol. Soc. Japan, Vol.43, No.1, pp. 25-31, doi: 10.18940/kazan.43.1_25, 1998 (in Japanese with English abstract).
  17. [17] M. Yaguchi, T. Ohba, and M. Sago, “The nature and source of the volcanic ash during the 2015 small phreatic eruption at Hakone volcano, central Japan,” Geochem. J., Vol.53, No.3, pp. 209-217, doi: 10.2343/geochemj.2.0560, 2019.
  18. [18] K. Nogami, J. Hirabayashi, T. Ohba, J. Ossaka, M. Yamamoto, S. Akagi, T. Ozawa, and M Yoshida, “Temporal variations in the constituents of volcanic ash and adherent water-soluble components in the Unzen Fugendake eruption during 1990–1991,” Earth Planets and Space, Vol.53, No.7, pp. 723-730, doi: 10.1186/BF03352400, 2001.
  19. [19] J. Ossaka and J. Hirabayashi, “The 1982, 1983 eruptions of the Asama Volcano from the geochemical point of view” Programme and Abstracts Volcanol. Soc. Japan 1983, p. 422, doi: 10.18940/kazanc.28.4_422_1, 1983 (in Japanese).

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Last updated on Apr. 22, 2024