(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.\n\nAn 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)\nDirection of drift of ash plume/cloud of the volcano: WSW / azimuth 256 deg \nTime and method of ash plume/cloud determination: 20230411/0314Z – Suomi NPP 15m16\nStart time of explosion and how determined: 20230410/1320Z – Satellite data(14) Remarks:(15) Contacts: Alexander G. Manevich, IVS FEB RAS\nmag@kscnet.ru +74152202115\n\nDuty 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/.\n\nIn 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.