(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20230410/1929Z (3) Volcano:Sheveluch (CAVW #300270) (4) Current aviation colour code:RED (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2023-51 (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 10 km a.s.l., a large ash cloud is drifting to the west of the volcano.\n\nAn extrusive 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:10000 m (32800 ft) AMSL Time and method of ash plume/cloud height determination: 20230410/1820Z – Himawari-9 14m15(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 100 km (62 mi)\nDirection of drift of ash plume/cloud of the volcano: W / azimuth 280 deg \nTime and method of ash plume/cloud determination: 20230410/1820Z – Himawari-9 14m15(14) Remarks:(15) Contacts:Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS\ngirina@kscnet.ru +74152202044\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.