Table 1 JMA Criteria for issue of VAFFs (effective March 2014)
From: Improvements of volcanic ash fall forecasts issued by the Japan Meteorological Agency
Volcano | Criteria |
|---|---|
Asamayama | Observation of an eruption of plume height ≥3000 m above the crater rim. For plume heights of 1000–3000 m, a VAFF may be issued under some circumstances. |
Kirishimayama (Shinmoedake) | Observation of an eruption of plume height ≥2000 m above the crater rim. |
Sakurajima | Observation of an eruption of plume height ≥2500 m (criterion was 3000 m until May 20, 2013) above the crater rim. |
Other Japanese volcanoes | Observation of an eruption plume height of ≥3000 m above the crater rim. |