(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20181226/2329Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2018-130
(8) Volcano Location:	N 56 deg 38 min E 161 deg 18 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	10768.24 ft (3283 m), the dome elevation ~8200 ft (2500 m)
(11) Volcanic Activity Summary:	Activity of Sheveluch volcano continues. The meteorological conditions (cyclones) in the northern part of Kamchatka caused a strong increased a gas-steam activity of the volcano, on the background of which, on December 26, explosive events repeatedly occurred with ash emission up to 6-9 km a.s.l. Ash clouds continues to drift to the north-west from the volcano. Explosive-extrusive eruption of the volcano continues. Ash explosions up to 26,200-49,200 ft (8-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	29520-32800 ft (9000-10000 m) AMSL Time and method of ash plume/cloud height determination: 20181226/2300Z – Himawari-8
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 122 mi (196 km) Direction of drift of ash plume/cloud of the volcano: WNW / azimuth 299 deg Time and method of ash plume/cloud determination: 20181226/2300Z – Himawari-8
(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.