(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20170518/0254Z (3) Volcano:Sheveluch (CAVW #300270) (4) Current Aviation Color Code:ORANGE (5) Previous Aviation Color Code:orange (6) Source:KVERT (7) Notice Number:2017-85 (8) Volcano Location:N 56 deg 38 min E 161 deg 18 min (9) Area:Kamchatka, Russia (10) Summit Elevation:10768.24 ft (3283 m), the dome elevation ~8200 ft (2500 m)(11) Volcanic Activity Summary:Common ash plume containing ash from Klyuchevskoy volcano (uninterrupted emission of ash from about 1800 UTC till 2400 UTC on 17 May) and Sheveluch volcano (two ash bursts from about 2200 and 2330 UTC on 17 May) continues to drift to the north-east from the volcano Sheveluch.\n\nExplosive-extrusive eruption 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:11152-13120 ft (3400-4000 m) AMSL Time and method of ash plume/cloud height determination: 20170518/0200Z – Himawari-8(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 106 mi (170 km)\nDirection of drift of ash plume/cloud of the volcano: ENE / azimuth 60 deg \nTime and method of ash plume/cloud determination: 20170518/0200Z – Himawari-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.