(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20180615/2202Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2018-51 (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 single moderate explosion sent ash up to 6 km a.s.l. from 2138 UTC, ash plume drift to the south-western direction from the volcano.\n\nA moderate activity of the volcano continues. Ash explosions up to 26,240 ft (8 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircrafts. (12) Volcanic cloud height:19680 ft (6000 m) AMSL Time and method of ash plume/cloud height determination: 20180615/2156Z – Video data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 3 mi (5 km)\nDirection of drift of ash plume/cloud of the volcano: SW\nTime and method of ash plume/cloud determination: 20180615/2138Z – Video data\nStart time of explosion and how determined: /2138Z – unknown(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/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.