Eruption Notices provide information on volcanic eruptions occurring after a period of inactivity or those on an unprecedented scale that may lead to a change in the volcanic alert level.
They allow people such as climbers entering volcanic areas to take appropriate protective action.

Example
Kirishimayama (Shinmoedake) Eruption Notice 14:00 JST 19 May 2015 Kirishimayama (Shinmoedake) eruption

Leaflet

Eruption Notices(PDF,768KB)