(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20210123/0212Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2021-13 (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:A moderate explosive-effusive eruption of the volcano continues. According to video data, a gas-steam plume with some amount of ash is extending for 74 km to the north-west of the volcano.\n\nA moderate explosive-effusive eruption of the volcano continues. Ash explosions up to 7-8 km (23,000-26,200 ft) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft. (12) Volcanic cloud height:6000-6500 m (19680-21320 ft) AMSL Time and method of ash plume/cloud height determination: 20210123/0205Z – Video data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 74 km (46 mi)\nDirection of drift of ash plume/cloud of the volcano: NNW / azimuth 340 deg \nTime and method of ash plume/cloud determination: 20210123/0141Z – MODIS TERRA (31m32)(14) Remarks:(15) Contacts: Dmitry V. Melnikov, IVS FEB RAS\ndvm@kscnet.ru \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.