(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20181230/2348Z (3) Volcano:Sheveluch (CAVW #300270) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2018-137 (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:An eruptive activity of the volcano continues. Satellite data by KVERT showed the ash plume on the height 4 km a.s.l. continues to drift for about 165 km to the south-east 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:13120 ft (4000 m) AMSL Time and method of ash plume/cloud height determination: 20181230/2345Z – Video data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 103 mi (165 km)\nDirection of drift of ash plume/cloud of the volcano: SE / azimuth 141 deg \nTime and method of ash plume/cloud determination: 20181230/2320Z – Himawari-8(14) Remarks:(15) Contacts: Dmitry V. Melnikov, IVS FEB RAS\ndvm@kscnet.ru \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.