(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20230228/0431Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2023-28
(8) Volcano Location:	N 56 deg 38 min E 161 deg 18 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	3283 m (10768.24 ft), the dome elevation ~2500 m (8200 ft)
(11) Volcanic Activity Summary:	The growth of the lava dome continues, a strong fumarole activity, an incandescence of the lava dome, sometimes explosions, and hot avalanches accompanies this process. Satellite and video data by KVERT showed a gas-steam plume contained some amount of ash is drifting to the north-east of the volcano. The extrusive eruption of the volcano continues. Ash explosions up to 10-15 km (32,800-49,200 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	3700-4000 m (12136-13120 ft) AMSL Time and method of ash plume/cloud height determination: 20230228/0425Z – Video data
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 47 km (29 mi) Direction of drift of ash plume/cloud of the volcano: NE / azimuth 50 deg Time and method of ash plume/cloud determination: 20230228/0340Z – Himawari-9 14m15
(14) Remarks:
(15) Contacts:	Dmitry V. Melnikov, IVS FEB RAS dvm@kscnet.ru 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/. 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.