Volcanic Warnings and Volcanic Alert Levels
What are Volcanic Warnings?
- Volcanic Warnings are issued in relation to expected volcanic disasters, and identify potentially affected areas.
- For residential areas*
Volcanic Warnings (for residential areas) (a.k.a. Residential Area Warnings) - For non-residential areas near the crater*
- Around the crater
Volcanic Warnings (for areas near the crater) (a.k.a. Near-crater Warnings)
*Designated areas are described in literature such as regional disaster prevention plans.
- For residential areas*
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Volcanic forecasts are issued when Volcanic Warnings are not issued.
- Volcanic Warnings help to keep residents informed.
Current volcanic activity, such as the number of volcanic tremors, is described in the Outline of Volcanic Activity section.
Provision of Volcanic Warnings
Volcanic Warnings are issued to residents via the media, prefectural offices and local municipalities.
Volcanic Alert Levels in Volcanic Forecasts/Warnings
Volcanic Warning System
(for volcanoes where volcanic alert levels are applied)
- There are five Volcanic Alert Levels based on the target area and action to be taken. These are described using action summary keywords.
- Clear action summary descriptions enable residents to take quick and appropriate action against disasters.
- Warnings are issued to residential areas when the Volcanic Alert Level is 4 or 5.
- Near-crater Warnings are issued to areas around the crater when the Volcanic Alert Level is 2, and to non-residential areas near the crater when it is 3.
Volcanic Warning System
(for volcanoes where volcanic alert levels are not applied)
