(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20230411/0548Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current aviation colour code:	RED
(5) Previous aviation colour code:	red
(6) Source:	KVERT
(7) Notice Number:	2023-54
(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:	Strong explosive eruption of Sheveluch volcano continues. Explosions sent ash up to 8 km a.s.l., ash clouds are drifting about 430 km to the west-south-west and to the south of the volcano. An eruption of the volcano continues. Ash explosions up to 15 km (49,200 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	7000-8000 m (22960-26240 ft) AMSL Time and method of ash plume/cloud height determination: 20230411/0314Z – Suomi NPP 15m16
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 435 km (270 mi) Direction of drift of ash plume/cloud of the volcano: WSW / azimuth 256 deg Time and method of ash plume/cloud determination: 20230411/0314Z – Suomi NPP 15m16 Start time of explosion and how determined: 20230410/1320Z – Satellite 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.