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Issue time:

Colour code

SFC/Flight Level 100


Date: 2011-10-12 16:00 UTC
Area: Sumatra
Source: Cvghm
Aviation colour code:  orange
Summit elevation:  2891m
Eruption Details: reported eruption at 0233z. va reached 10000ftmoving e slowly.

Volcano ash cloud Sumatra - Marapi   Wednesday 12 Oct 2011 16:00 UTC

Remarks: corection graphics.

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.