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Issue time:

Colour code


Date: 2012-02-29 14:00 UTC
Source: Guam Nws. Mtsat. Gfs Winds.
Aviation colour code: 
Summit elevation:  3166 ft [965 m]
Eruption Details: possible emission of gas andlgt va

Volcano ash cloud - Agrigan   Wednesday 29 Feb 2012 20:00 UTC

Remarks: corected for 6,12,18 hr forecasts...sw irand ir imagery suggest possible emission of gasand va extending up to 74 km nw from summit.

This data supplements the official Volcanic Ash Advisory Graphics and Volcanic Ash Advisories. The data is to be used with caution. The official Volcanic Ash Graphics and Volcanic Ash Advisories take precedence in all circumstances. Please refer to national NOTAMs for definitive boundaries of no-fly areas.

Altitiude levels (International Standard Atmosphere)

SFC to FL200 - Ash concentrations between the surface and 20,000 feet.
FL200 to FL350 - Ash concentrations between 20,000 feet and 35,000 feet.
FL350 to FL550 - Ash concentrations between 35,000 feet and 55,000 feet.
SFC to 6000FT - Ash concentrations between the surface and 6,000 feet.