(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20181227/0328Z (3) Volcano:Sheveluch (CAVW #300270) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2018-131 (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:A strong gas-steam activity of the volcano, sometimes with ash emission, continues. A gas-steam with ash plume drift to the north-west from the volcano. \n\nExplosive-extrusive eruption of the volcano continues. Ash explosions up to 26,200-49,200 ft (8-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:14760-16400 ft (4500-5000 m) AMSL Time and method of ash plume/cloud height determination: 20181227/0230Z – MODIS AQUA (31m32)(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 43 mi (70 km)\nDirection of drift of ash plume/cloud of the volcano: WNW / azimuth 302 deg \nTime and method of ash plume/cloud determination: 20181227/0230Z – MODIS AQUA (31m32)(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.