First published 9/22/2026, 5:33:15 AM · Last updated 9/27/2026, 6:48:04 PM

降灰予報（定時）

The item is an ash-fall forecast for Aso Volcano (阿蘇山). It states Aso is currently at eruption alert level 2 (crater-area restrictions). If an eruption occurs, ashfall is expected to the west of the crater between 22日21時 and 22日24時. Listed municipalities expecting ashfall are: 熊本県熊本市, 熊本県玉名市, 熊本県山鹿市, 熊本県菊池市, 熊本県宇土市, 熊本県阿蘇市, 熊本県合志市. Coordinates provided: 3253.07, 13106.23. Depth: 1.6 km.

Categories: severe-weather-and-natural-disasters

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 3/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

The forecast identifies a near-term ashfall window and names multiple municipalities in Kumamoto Prefecture that may receive ash if Aso Volcano erupts, and notes the volcano's current alert level (噴火警戒レベル２).

Location

Sources

降灰予報（定時）

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