VONA notifications

VONA notifications

Aviation color code

The aviation color code (ACC) follows recommendations of the International Civil Aviation Organization (ICAO) and provides pilots, the public, and aviation authorities with information about the status of volcanoes that could affect air traffic.

The aviation color code is independent of the color code also issued by the Icelandic Meteorological Office, known as the “Volcano Alert Level System (VALS).” The VALS color code is intended to convey information about potential impacts on the ground, and therefore, these two color codes may differ at any given time.



Notification of change in aviation color code

Grímsvötn

Time: 20. Jan 2025, 09:48 GMT

Color code:  green 

Volcano id: 373010

Activity summary:
The flood at Grímsvötn (started around 10 January) can be considered over. Both seismic and water discharge data show normal values. The pressure decrease caused by the water volume loss from the subglacial lake, did not trigger further escalation at Grímsvötn volcano. The aviation color code is moved back to green as, at present, there are no indications of potential increase in volcanic activity.

Cloud height:
No eruption ongoing.

Other cloud information:
No eruption ongoing.

Remarks:
Additional information about Grímsvötn are available here: https://icelandicvolcanoes.is/?volcano=GRV






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