Eruption — Asosan
Highupdated 52 days agoAsosan volcano in Aso City, Japan is currently active with increased volcanic tremors and elevated sulfur dioxide emissions measured at 2,700 tons per day.
- 50kmRadius of the affected area
What this changes for you, on the ground
Asosan volcano in Aso City, Japan is currently active with increased volcanic tremors and elevated sulfur dioxide emissions measured at 2,700 tons per day. The Japan Meteorological Agency raised the Alert Level to 3 on a scale of 1 to 5, indicating a high-severity situation. Eruptive products may impact areas within 2 km of the crater, with effects potentially felt across a radius of about 50 km.
Read the full analysis
If you are on site in the affected area, monitor official announcements closely and be prepared to follow evacuation orders if issued. Volcanic ash and gases can affect air quality and visibility. Avoid approaching the volcano and restricted zones. Follow all instructions from local authorities and emergency services.
Consult the Japan Meteorological Agency for real-time updates and guidance specific to your location. If you experience respiratory symptoms or other health concerns, contact local health authorities. This alert is based on official data from the Japan Meteorological Agency.
Written with the help of AI from Mira Safe's sourced data on August 24, 2026 · does not replace local guidance How this analysis is produced →
Related events in this alert
The facts this alert is built on — the original one first, then what joined it.
How it evolved
- Alert raisedHighAugust 20, 2026 at 8:35 PM
A single entry: the alert has not changed state since it was raised.
Other ongoing alerts — Japan
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