Volcano in Japan
Asosan volcano: eruption status today
Updated
No eruption of Asosan is being reported right now Last eruption: 1964 or later; last significant eruption 2016 (NOAA NCEI).
Live status of Asosan: whether it is erupting now, satellite hot spots, earthquakes around it, and what an eruption would mean for nearby cities and flights.
- Status now
- No open report
- Last eruption
- 1964 or later last significant: 2016
- Elevation
- 1,592 m 5,223 ft
- Type
- Caldera
- Earthquakes within 50 km
- 1 past 30 days (USGS)
- Hot spots within 10 km
- 0 latest NASA FIRMS VIIRS data
- Nearest city
- Kotō 34 km WSW
Is Asosan erupting right now?
There is no open NASA EONET event for Asosan right now. NOAA NCEI dates its most recent eruption to 1964 or later, and the last eruption in its significant-eruption database was in 2016. Volcano observatories can raise alert levels before an eruption starts, so check the national observatory for the current alert level.
No satellite thermal hot spot was detected within 10 km of the summit in the latest NASA FIRMS data, so there is no sign of lava at the surface large enough for VIIRS to see (clouds can hide it).
Earthquakes near Asosan
USGS located 1 earthquake within 50 km of Asosan in the past 30 days, 0 of them in the last week. The largest was M4.4 on Sep 26, 2026, 39 km WSW of the summit at 10 km depth.
0 of them were shallower than 10 km. Swarms of shallow quakes can mean magma or gas is moving, but most swarms end without an eruption; observatories combine them with ground deformation and gas data.
| Time (UTC) | Magnitude | Distance | Depth | Location |
|---|---|---|---|---|
| Sep 26, 01:31 UTC | M4.4 | 39 km WSW | 10 km | 6 km NE of Uto, Japan |
About Asosan
Asosan is a caldera in Kyushu-Japan, Japan, rising to 1,592 m (5,223 ft). NOAA NCEI classes its eruptive history as "Historical".
A caldera is a large collapse depression left after a major eruption; activity can range from small steam blasts to rare, very large eruptions.
The nearest large town is Kotō, about 34 km WSW of the summit; 5 other cities lie within 250 km.
- Kotō (34 km) earthquakes nearby
- Kumamoto (38 km) earthquakes nearby
- Beppu (58 km) earthquakes nearby
- Ōmuta (61 km) earthquakes nearby
- Ōita (62 km) earthquakes nearby
- Honmachi (62 km) earthquakes nearby
Flights and volcanic ash
No major hub airport is within 400 km (the closest is Kansai, 422 km away), but ash clouds from explosive eruptions can drift for thousands of kilometres along flight routes.
Volcanic Ash Advisory Centres (VAACs) issue the official ash advisories that airlines and air traffic control follow.
Other volcanoes in Japan
Japan has 52 volcanoes on this site that erupted since 1900 or are active now, 3 of them with an open NASA activity report today. The closest other one is Kujusan, 27 km away.
Nearby volcanoes
Volcanoes in Japan
More
Data: NOAA NCEI Volcano Locations, NASA EONET (open volcano events), USGS earthquakes, NASA FIRMS (VIIRS hot spots), Smithsonian Global Volcanism Program.