(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20170802/0042Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current Aviation Color Code:ORANGE (5) Previous Aviation Color Code:orange (6) Source:KVERT (7) Notice Number:2017-173 (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 eruptive activity of the volcano continues. Gas-steam plume containing some amount of ash extended for about 65 km to thesouth-west from the volcano.\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:18040 ft (5500 m) AMSL Time and method of ash plume/cloud height determination: 20170802/0035Z – Video data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 40 mi (65 km)\nDirection of drift of ash plume/cloud of the volcano: SW / azimuth 218 deg \nTime and method of ash plume/cloud determination: 20170802/0020Z – Himawari-8\nDuration of explosion: ~ 720 minutes(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 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.