(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20230411/1948Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current aviation colour code:	RED
(5) Previous aviation colour code:	red
(6) Source:	KVERT
(7) Notice Number:	2023-55
(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 the volcano continues. Explosions send ash up to 8 km a.s.l., and a large ash plume is extending for about 600 km to the south-west and 1050 km to the east-south-east of the volcano. An eruption of the volcano continues. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	8000 m (26240 ft) AMSL Time and method of ash plume/cloud height determination: 20230411/1830Z – Himawari-9 14m15
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 1050 km (652 mi) Direction of drift of ash plume/cloud of the volcano: ESE / azimuth 113 deg Time and method of ash plume/cloud determination: 20230411/1830Z – Himawari-9 14m15
(14) Remarks:
(15) Contacts:	Anton A. Nuzhdaev, IVS FEB RAS envi@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.