(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20170820/0450Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current Aviation Color Code:ORANGE (5) Previous Aviation Color Code:orange (6) Source:KVERT (7) Notice Number:2017-213 (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 explosive eruption of the volcano continues. Explosions send ash up to 7.0 km a.s.l., and ash plume drift for about 252 km to the west-north-west from the volcano, a part of this ash plume is extending for about 140 km to the east.\n\nEruptive activity of the volcano continues. Ash explosions up to 26,200-32,800 ft (8-10 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:22960 ft (7000 m) AMSL Time and method of ash plume/cloud height determination: 20170820/0442Z – Video data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 157 mi (252 km)\nDirection of drift of ash plume/cloud of the volcano: WNW / azimuth 302 deg \nTime and method of ash plume/cloud determination: 20170820/0420Z – Himawari-8\nDuration of explosion: ~ 360 minutes(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.