(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20231102/2124Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:red (6) Source:KVERT (7) Notice Number:2023-147 (8) Volcano Location:N 56 deg 3 min E 160 deg 38 min (9) Area:Kamchatka, Russia (10) Summit Elevation:4750 m (15580 ft)(11) Volcanic Activity Summary:The explosive-effusive eruption of the volcano continues. Satellite data by KVERT showed an ash column rose up to 6-6.5 km a.s.l., and an ash plume is extending for 358 km to the north-northeast of the volcano.\n\nThe summit explosive-effusive eruption of the volcano continues. A danger of ash explosions up to 10 km (32,800 ft) a.s.l. remains. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:6000-6500 m (19680-21320 ft) AMSL Time and method of ash plume/cloud height determination: 20231102/2050Z – Himawari-9 14m15(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 358 km (222 mi)\nDirection of drift of ash plume/cloud of the volcano: NNE / azimuth 32 deg \nTime and method of ash plume/cloud determination: 20231102/2050Z – Himawari-9 14m15(14) Remarks:An edge of ash cloud of the paroxysmal phase of the Klyuchevskoy eruption extended more than 3000 km to the east-southeast of the volcano.(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.