Adatara is a stratovolcano found about 15 km southeast of Fukushima city. It is made up of three cones (Maegatake, Osoyozan and Adatara). These cones are basaltic to andesitic in composition. The summit of Adatara is a lava dome. Adatara has had two historical eruptions. Its last eruption was in 1990. Historical eruptions have been limited to Numano-daira crater.
September 15, 1997
Four hikers lost their lives when they fell into a summit crater on Adatara Volcano in Japan. They probably died due to inhalation of H2S in the bottom of the crater. Public warnings were given to stay away from the volcano, as activity has increased there over the past few years. This increased activity has included mud spouting from ponds on the crater floor and increased fumarolic activity.
This information was summarized from a report sent to us by Setsuya Nakada.
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