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Issue time:

Colour code

SFC/Flight Level 100
SFC/Flight Level 180


Date: 2011-07-17 18:00 UTC
Area: Africa
Source: Satellite Imagery
Aviation colour code:  nil
Summit elevation:  2218m
Eruption Details: weak eruption started around 17/0630zobs va dtg: 17/1800z

Volcano ash cloud Africa - Nabro   Sunday 17 Jul 2011 18:00 UTC

Remarks: eruption seems now stopped

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.