(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20171205/2315Z
(3) Volcano:	Klyuchevskoy (CAVW #300260)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	green
(6) Source:	KVERT
(7) Notice Number:	2017-258
(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:	A strong gas-steam activity of the volcano was observing on 02-05 December. Some amount of ash in the gas-steam plumes began to detecting from ~ 1100 UTC on 05 December. Activity of the volcano continues. A gas-steam with some amount of ash activity of the volcano continues. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:	15744-16400 ft (4800-5000 m) AMSL Time and method of ash plume/cloud height determination: 20171205/2310Z – Video data
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 106 mi (170 km) Direction of drift of ash plume/cloud of the volcano: E / azimuth 92 deg Time and method of ash plume/cloud determination: 20171205/2054Z – NOAA 18 (4m5)
(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.