A sightseeing helicopter carrying two Taiwanese tourists and a Japanese pilot was found wrecked near the crater of Mount Aso in Kumamoto Prefecture, southwestern Japan, on January 20, 2026, after disappearing during a short flight earlier the same day. Rescue operations have been severely hampered by dense volcanic gas emissions and poor visibility around the active crater.
A seismic swarm started under the Asosan volcano in Japan on January 30, 2023, prompting the Japan Meteorological Agency (JMA) to raise the Volcanic Alert Level from 1 to 2.
A powerful phreatic explosion took place at Asosan's Nakadake crater at 02:43 UTC (14:43 JST) on October 20, 2021, prompting the Japan Meteorological Agency (JMA) to raise the Alert Level from 2 to 3 at 02:48 UTC. The eruption came one week after volcanic…
A small-scale eruption started at Asosan volcano, Japan at 22:57 UTC on July 25, 2019 (07:57 LT, July 26), producing an ash column up to 3 km (10 000 feet) above sea level. This is the latest in a series of small eruptions at the volcano that started on April 16,…
Another minor eruption took place at Japanese Asosan volcano (Mount Aso) in Kumamoto Prefecture late Thursday, April 18, 2019. The eruption started at 23:24 UTC on April 18 (08:24 JST, April 19) at the No. 1 Nakadake crater, spewing ash up to 400 m (1 312 feet)…
The Japanese Asosan volcano erupted at 09:28 UTC (18:28 LT) on April 16, 2019. It was its first eruption since October 8, 2016. The Alert Level was raised to 2 on April 14. At one point, the volcanic ash reached 200 m (656 feet) above the crater (1 792 m / 5 880…
The Japan Meteorological Agency (JMA) has raised the Alert Level for Asosan volcano, Kyushu, Japan from Level 1 to Level 2 (do not approach the crater) at 06:00 JST on March 12, 2019. The last eruptive episode of this volcano started on October 7, 2016 and ended on…
Japanese Asosan volcano (Mount Aso; the largest active volcano in Japan) erupted at 16:46 UTC on October 7, 2016, sending a column of ash up to 11 km (36 000 feet) above sea level. JMA issued its third-highest alert (of 5), warning people not to approach the…
Japan's Asosan volcano erupted about 00:43 UTC on Monday, September 14, 2015, sending a plume of thick black smoke and ash about 2.1 km (1.2 miles) into the air and disrupting flights.According to the Japan Meteorological Agency, Asosan erupted without warning in on
Japanese Asosan volcano experienced a new eruption at 01:33 UTC on December 23, 2014. Tokyo VAAC reported volcanic ash cloud reached an altitude of 2.1 km (7 000 feet) and extended East. At 06:11 UTC it rose to approximately 2.3 km (8 000 feet) and was still extending
