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VONA/KVERT Releases of VAN
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KVERT/Volcano Observatory Notifications to Aviation (VONA)

Информация Камчатской группы реагирования на вулканические извержения (KVERT)

 (2) Issued:20180322/2252Z
 (3) Volcano:Maly Semyachik (CAVW #300140)
 (4) Current aviation colour code:YELLOW
 (5) Previous aviation colour code:green
 (6) Source:KVERT
 (7) Notice Number:2018-31
 (8) Volcano Location:N 54 deg 8 min E 159 deg 40 min
 (9) Area:Kamchatka, Russia
(10) Summit Elevation:5116.8 ft (1560 m)
(11) Volcanic Activity Summary:An activity of the volcano increased. Satellite data by KVERT showed a thermal anomaly over the volcano on 20-22 March. It is assumed that the ice cover of the lake has melted. Explosive activity of the volcano is possible.

An activity of the volcano increased. Ash explosions up to 16,400-23,000 ft (5-7 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:NO ASH CLOUD PRODUSED
(13) Other volcanic cloud information:NO ASH CLOUD PRODUSED
(14) Remarks:
(15) Contacts:Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS
girina@kscnet.ru +74152202044

Duty scientist: +79622825253
(16) Next Notice:A new VONA will be issued if conditions change significantly or the colour code is changed. VONAs are posted at http://www.kscnet.ru/ivs/kvert/index_eng.php.

In Russia, KVERT, on behalf of the Institute of Volcanology and Seismology (IVS) FEB 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, Март 22, 2018. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2018-31.

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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