(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20170422/2222Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current Aviation Color Code:ORANGE (5) Previous Aviation Color Code:yellow (6) Source:KVERT (7) Notice Number:2017-57 (8) Volcano Location:N 56 deg 3 min E 160 deg 38 min (9) Area:Kamchatka, Russia (10) Summit Elevation:15580 ft (4750 m)(11) Volcanic Activity Summary:A moderate activity of the volcano continues. Satellite data by KVERT showed a gas-steam containing a some amount of ash drift to the south-west from the volcano; a weak thermal anomaly over the volcano was noted.\n\nA moderate activity of the volcano continues. Aerosol plumes could affect low-flying aircraft. (12) Volcanic cloud height:16400 ft (5000 m) AMSL Time and method of ash plume/cloud height determination: 20170422/2150Z – Himawary-8(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 78 mi (125 km)\nDirection of drift of ash plume/cloud of the volcano: SSW / azimuth 210 deg \nTime and method of ash plume/cloud determination: 20170422/2150Z – Himawary-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 Aviation Color Code is changes. VONAs are posted at http://www.kscnet.ru/ivs/kvert/index_eng.php.\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.