(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.\n\nAn 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)\nDirection of drift of ash plume/cloud of the volcano: ESE / azimuth 113 deg \nTime and method of ash plume/cloud determination: 20230411/1830Z – Himawari-9 14m15(14) Remarks:(15) Contacts: Anton A. Nuzhdaev, IVS FEB RAS\nenvi@kscnet.ru \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.