(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20181229/2106Z (3) Volcano:Sheveluch (CAVW #300270) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2018-133 (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 moderate eruptive activity of the volcano continues. The meteorological conditions (cyclones) in the northern part of Kamchatka caused a strong increased a gas-steam activity of the volcano, on the background of which, on December 26-29, explosive events repeatedly occurred with ash emission. Satellite data by KVERT showed explosions sent ash up to 6 km a.s.l. on 29 December, a gas-steam plume and ash clouds are extending for about 75 km to the west from the volcano.\n\nA moderate gas-steam activity of the volcano continues. Ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircrafts. (12) Volcanic cloud height:19680-19680 ft (6000-6000 m) AMSL Time and method of ash plume/cloud height determination: 20181229/2040Z – Himawari-8(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 47 mi (75 km)\nDirection of drift of ash plume/cloud of the volcano: W / azimuth 260 deg \nTime and method of ash plume/cloud determination: 20181229/2040Z – 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 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.