(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20171218/0320Z
(3) Volcano:	Bezymianny (CAVW #300250)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	yellow
(6) Source:	KVERT
(7) Notice Number:	2017-263
(8) Volcano Location:	N 55 deg 58 min E 160 deg 35 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	9452.96 ft (2882 m)
(11) Volcanic Activity Summary:	Activity of the volcano gradually increases. According to videodata by RAS, hot avalanches at the southeastern flank of the lava dome were observing last several hours - probably an extrusive eruption of the volcano occurrs. Strong ash explosions up to 10-15 km a.s.l. could occur at any time. KVERT continues to monitor Bezymianny volcano. Activity of the volcano gradually increases. Strong ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and 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.