(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20231105/2314Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2023-153 (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 fumalole activity of the Klyuchevskoy volcano continues. The large hot lava flows lying in the Apakhonchichsky and Kozyrevsky chutes, continues to provoke the collapses of old pyroclastic material from the sides of the chutes. From time to time, ash plumes appeare that raise to 5.5 km a.s.l., an ash plume is extending for 258 km to the east of the volcano.\n\nThe activity of the volcano continues. A danger of ash rising up to 7 km (23,000 ft) a.s.l. remains. Ongoing activity could affect low-flying aircraft. (12) Volcanic cloud height:5500 m (18040 ft) AMSL Time and method of ash plume/cloud height determination: 20231105/2230Z – Himawari-9 14m15(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 258 km (160 mi)\nDirection of drift of ash plume/cloud of the volcano: E / azimuth 82 deg \nTime and method of ash plume/cloud determination: 20231105/2230Z – 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.