Aviation color codes
Volcanic danger prognosis for aviation (in Russian)
Activity of the volcanoes in photos
KVERT/Volcano Observatory Notification for Aviation

Archives in the old format
VONA/KVERT Information Releases (01.2005-05.2012)
 (2) Issued:20161021/0246Z
 (3) Volcano:Klyuchevskoy (CAVW #300260)
 (4) Current Aviation Color Code:ORANGE
 (5) Previous Aviation Color Code:orange
 (6) Source:KVERT
 (7) Notice Number:2016-158
 (8) Volcano Location:N 56 deg 3 min E 160 deg 38 min
 (9) Area:Kamchatka, Russia
(10) Summit Elevation:15580 ft (4750 m)
(11) Volcanic Activity Summary:Explosive-effusive eruption of the volcano continues. A gas-steam plume containing ash raise up to 7 km a.s.l. and drifting to the north-west from the volcano.

Explosive-effusive eruption of the volcano continues. Ash explosions up to 26,240-33,000 ft (8-10 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:21320-22960 ft (6500-7000 m) AMSL Time and method of ash plume/cloud height determination: 20161021/0111Z – MODIS TERRA (31m32)
(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 37 mi (59 km)
Direction of drift of ash plume/cloud of the volcano: NW / azimuth 309 deg
Time and method of ash plume/cloud determination: 20161021/0111Z – MODIS TERRA (31m32)
(14) Remarks:
(15) Contacts:Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS +74152202044

Duty scientist: +79622825253
(16) Next Notice:A new VONA will be issued if conditions change significantly or the Aviation Color Code is changes. VONAs are posted at

In Russia, KVERT, on behalf of the Institute of Volcanology and Seismology (IVS) FED RAS, is responsible for providing information on volcanic activity to international air navigation services for the airspace users.


For formal scientific citation of this VONA/KVERT Information Release, please use the following:
VONA/KVERT Information Release, October 21, 2016. KVERT, Institute of Volcanology and Seismology FEB RAS. URL:

Aviation Color Codes

Volcano is in normal, non-eruptive state

   or, after a change from a higher level: 

Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.

Volcano is experiencing signs of elevated unrest above known background levels. 

   or, after a change from higher level: 

Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

Volcano is exhibiting heightened unrest with increased likelihood of eruption.


Volcanic eruption is underway with no or minor ash emission.
[specify ash-plume height if possible]

Eruption is forecast to be imminent with significant emission of ash into the atmosphere likely.


Eruption is underway with significant emission of ash into the atmosphere.
[specify ash-plume height if possible]

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