Volcano Ontake
On 27 September 2014 a sudden steam-driven eruption caught hundreds of hikers at the summit on a clear autumn day. 63 people died or remain missing, Japan's deadliest volcanic disaster since the 1920s. Earthquakes had increased in the weeks before, but gave no clear signal of what was coming.
Last eruption
Erupted since 2000
Summit
Complex volcano · Andesite / Basaltic Andesite
Activity
0 events (1.0x rate)
Interactive Volcano & Seismicity Map
Seismicity within 50 km radius, active VAAC ash plumes, and tectonic plate boundaries.
Recent seismicity within 50 km
0 events in the last 12 h within 25 km of the crater.
| Time | Magnitude | Epicenter / Place | Distance |
|---|---|---|---|
| 17d ago | M2.8 | 88 km SW of Nagano (Japan) | 16 km |
| 20d ago | M2.8 | 長野県南部, Japan | 11 km |
| 23d ago | M2.0 | 長野県中部, Japan | 30 km |
| 34d ago | M3.0 | EASTERN HONSHU, JAPAN (JMA) | 44 km |
| 34d ago | M3.0 | 岐阜県美濃東部, Japan | 44 km |
| 48d ago | M3.8 | EASTERN HONSHU, JAPAN (JMA) | 45 km |
| 48d ago | M3.8 | 岐阜県美濃中西部, Japan | 45 km |
| 88d ago | M3.2 | EASTERN HONSHU, JAPAN (JMA) | 7.3 km |
Geological & Tectonic Profile
Complex volcanoOntake is an active Complex volcano formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Andesite / Basaltic Andesite.
Volcano Dossier
VN #283040Official catalogue parameters, coordinates, elevation and geotectonic classification.
Authoritative Monitoring Infrastructure
Japan
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Catalogue: Smithsonian Institution, Global Volcanism Program.Smithsonian GVP profile