Aviation Color Code used by USGS Volcano Observatories. Color codes, which are in accordance with recommended international Civil Aviation Organization (ICAO) procedures, are intended to inform the aviation sector about a volcano's status and are issued in conjunction with an Alert Level. Notifications are issued for both increasing and decreasing volcanic activity and are accompanied by text with details (as known) about the nature of the unrest or eruption, especially in regard to ash-plume information and likely outcomes.
Date: 2006
Volcano(es):
Photographer: Gardner, C. A.
URL: avo.alaska.edu/image/view/13193
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
Volcano(es):
Photographer: Gardner, C. A.
URL: avo.alaska.edu/image/view/13193
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
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