(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20230924/0008Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:YELLOW (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2023-104 (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 summit explosive-effusive eruption of the volcano continues. Against the background of explosive activity of the Strombolian type (lava fountaining in the volcanic crater), a lava flow continues to effuse along the Kozyrevsky chute on the southwestern slope of the volcano. Satellite data by KVERT showed a thermal anomaly over the volcano. KVERT continues to monitor Klyuchevskoy volcano.\n\nThe summit explosive-effusive eruption of the volcano continues. Ash explosions up to 6 km (19,700 ft) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft. (12) Volcanic cloud height:NO ASH CLOUD PRODUSED(13) Other volcanic cloud information:NO ASH CLOUD PRODUSED(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.