(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20180425/1008Z (3) Volcano:Klyuchevskoy (CAVW #300260) (4) Current aviation colour code:YELLOW (5) Previous aviation colour code:green (6) Source:KVERT (7) Notice Number:2018-38 (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 gas-steam activity of the volcano continues. According to visual data by volcanologists from the fly of Klyuchevskaya group of volcanoes on 25 April, sometimes an ash was noting in gas-steam bursts from the Klyuchevskoy volcano. Activity of the volcano is increasing.\n\nActivity of the volcano continues. Ash explosions up to 16,400-19,700 ft (5-6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft. (12) Volcanic cloud height:NO ASH CLOUD PRODUSED(13) Other volcanic cloud information:NO ASH CLOUD PRODUSED(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.