(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
 (2) Issued:20130817/0227Z
 (3) Volcano:Klyuchevskoy (CAVW #1000-26-)
 (4) Current Aviation Color Code:YELLOW
 (5) Previous Aviation Color Code:green
 (6) Source:KVERT
 (7) Notice Number:2013-05
 (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:New explosive eruption of Kluchevskoy volcano began from 06:30 UTC on August 15, 2013 (according to seismic data by KBGS RAS). An amplitude of volcanic tremor is about 3.36 mcm/s. Video data showed an incandescence of the volcano summit at night and gas-steam plumes containing small amount of ash up to 19,700 ft (6.0 km) a.s.l. and to the north-east of the volcano on August 15-16. Satellite data showed a big and bright thermal anomaly over the volcano on August 15-16.

Strombolian explosive eruption of the volcano began and continues. Ash explosions up to 19,700 ft (6.0 km) a.s.l. will continues. The activity of the volcano could affect low-flying aircraft.
(12) Volcanic cloud height:19.68 ft (6 m) a.s.l.
(13) Other volcanic cloud information:
(14) Remarks:
(15) Contacts:Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS
girina@kscnet.ru +74152297890

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 http://www.kscnet.ru/ivs/kvert/index_eng.php.

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.

CITATION GUIDELINES

For formal scientific citation of this VONA/KVERT Information Release, please use the following:
VONA/KVERT Information Release, August 17, 2013. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2013-05.
Aviation Colour Codes

GREEN

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.

YELLOW

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.

ORANGE

Volcano is exhibiting heightened unrest with increased likelihood of eruption.

   or,

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

RED

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

  or,

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