(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.\n\nAn 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)\nDirection of drift of ash plume/cloud of the volcano: SE\nTime and method of ash plume/cloud determination: 20230407/0538Z – Video data\nStart time of explosion and how determined: 20230407/0538Z – Video 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.