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Home > Weather and Earthquakes > Volcanic Ash Fall Forecasts

Volcanic Ash Fall Forecasts



Volcanic Ash Fall Forecasts (Preliminary or Detailed)
No Volcanic Ash Fall Forecasts (Preliminary or Detailed) are in effect.


Volcanic Ash Fall Forecasts (Scheduled)

※In cases where winds in the upper air are weak, or their directions significantly change in altitudes, volcanic ash fall (and lapilli) areas and amounts of forecasts may differ from ones of actual status.


Volcanic Ash Fall Forecasts
(Scheduled) are in effect.

Volcanic Ash Fall Forecasts (VAFFs)
Volcanic Ash Fall Forecasts (VAFFs) are issued for volcanoes where Volcanic Warnings or Volcanic Emergency Warnings are in effect. For protection against disaster in the vicinity of active volcanoes and to safeguard human life, JMA provides details of the expected timing, location and amount of ash fall, including areas of lapilli fall, for volcanoes via three types of VAFF.