(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20230407/0551Z
(3) Volcano:	Bezymianny (CAVW #300250)
(4) Current aviation colour code:	RED
(5) Previous aviation colour code:	red
(6) Source:	KVERT
(7) Notice Number:	2023-49
(8) Volcano Location:	N 55 deg 58 min E 160 deg 35 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	2882 m (9452.96 ft)
(11) Volcanic Activity Summary:	A strong explosive eruption occurred on 05:38 UTC April 07. Video and satellite data showed an ash plume up to 10-12 km a.s.l. is drifting to the south-east from the volcano. An eruption of the volcano continues. Ash explosions up to 10-15 km (32,800-49,200 ft) a.s.l. could occur during next several days. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	10000-12000 m (32800-39360 ft) AMSL Time and method of ash plume/cloud height determination: 20230407/0538Z – Video data
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 20 km (12 mi) Direction of drift of ash plume/cloud of the volcano: SE Time and method of ash plume/cloud determination: 20230407/0538Z – Video data Start time of explosion and how determined: 20230407/0538Z – Video data
(14) Remarks:
(15) Contacts:	Alexander G. Manevich, IVS FEB RAS mag@kscnet.ru +74152202115 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.