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Issue time:

Colour code


Date: 2012-08-14 04:00 UTC
Area: Tonga
Source: Pirep, Sat Imagery
Aviation colour code: 
Summit elevation:  515m
Eruption Details: erupted 20120813/0342zcolour code: unknown

Volcano ash cloud Tonga - Tofua   Tuesday 14 Aug 2012 10:00 UTC

Remarks: ash cld no longer observed and no longer detected on sat image

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.