(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20220420/0344Z (3) Volcano:Karymsky (CAVW #300130) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:red (6) Source:KVERT (7) Notice Number:2022-28 (8) Volcano Location:N 54 deg 2 min E 159 deg 26 min (9) Area:Kamchatka, Russia (10) Summit Elevation:1486 m (4874.08 ft)(11) Volcanic Activity Summary:An explosive activity of the volcano continues. Satellite data by KVERT showed a moderate ash emission up to 5 km a.s.l. from Karymsky volcano continues. The ash cloud 505x130 km in size at an altitude of up to 8.7 km a.s.l. continues to stretch and move to the northeast (about 302 km of the volcano), and south (about 260 km of the volcano) and southeast (about 220 km of the volcano) of the volcano.\n\nA moderate explosive activity of the volcano continues. Ash explosions up to 12 km (39,400 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:4500-5000 m (14760-16400 ft) AMSL Time and method of ash plume/cloud height determination: 20220420/0300Z – Himawari-8(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 45 km (28 mi)\nDirection of drift of ash plume/cloud of the volcano: SSE / azimuth 158 deg \nTime and method of ash plume/cloud determination: 20220420/0300Z – Himawari-8(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.