-- Volcano has current VAA and ash KML file
-- Volcano has VAA within the past 15 days
-- Volcano has Washington VAA since 1999
Show Combined Ash Layers
ICAO -- Volcanic Ash Advisories
International Civil Aviation Organization (ICAO) Products include Volcanic Ash Advisories (VAA) and associated Volcanic Ash Graphics (VAG) - VAA are issued every 6 hours or sooner for ash active volcanoes with VAG when ash is detected.