JDR Vol.19 No.1 pp. 50-55
doi: 10.20965/jdr.2024.p0050

Survey Report:

Vulnerability of Aso Volcano’s Disaster Mitigation System, as Revealed by the Phreatic Eruption of October 20, 2021

Takahiro Ohkura ORCID Icon

Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University
5280 Kawayo, Minamiaso, Aso, Kumamoto 869-1404, Japan

Corresponding author

August 21, 2023
December 15, 2023
February 1, 2024
disaster prevention literacy, phreatic eruption, Aso volcano, transmission of volcano information to climbers, improving volcanic disaster prevention literacy of climbers

At Aso volcano, phreatic and phreatomagmatic eruptions have repeatedly caused volcanic disasters with fatalities near the crater. While it is important to conduct research on eruption forecasting for reducing the risk to tourists and climbers of this volcano, it is also important to improve disaster prevention literacy regarding the volcanic eruptions. To improve disaster prevention literacy, it is important to elucidate the mechanisms of volcanic disasters based on case studies. In this study, the author chronologically summarizes the incident of the phreatic eruption that occurred in 2021 at Aso volcano. Although the Japan Meteorological Agency issued volcanic activity information sequentially as the volcanic activity increased, this information did not lead to prompt and effective closure of mountain trails. There was also a problem with the collection of volcanic information by climbers. It became clear that information on volcanic activity was not used effectively by either those regulating the mountain trails or those using them. Efforts should be made to resolve these issues in the future.

Cite this article as:
T. Ohkura, “Vulnerability of Aso Volcano’s Disaster Mitigation System, as Revealed by the Phreatic Eruption of October 20, 2021,” J. Disaster Res., Vol.19 No.1, pp. 50-55, 2024.
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Last updated on Jul. 12, 2024