(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20180428/0833Z (3) Volcano:Karymsky (CAVW #300130) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:green (6) Source:KVERT (7) Notice Number:2018-40 (8) Volcano Location:N 54 deg 2 min E 159 deg 26 min (9) Area:Kamchatka, Russia (10) Summit Elevation:4874.08 ft (1486 m)(11) Volcanic Activity Summary:According to satellite data, a moderate explosive activity of Karymsky volcano renew from about 06:25 UTC on April 28. Ash explosions sent ash up to 5.5 km a.s.l., ash plume drifted about 150 km to the north-east from the volcano.\n\nA moderate eruptive activity 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:18040-18040 ft (5500-5500 m) AMSL Time and method of ash plume/cloud height determination: 20180428/0630Z – Himawari-8(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 93 mi (150 km)\nDirection of drift of ash plume/cloud of the volcano: NE / azimuth 47 deg \nTime and method of ash plume/cloud determination: 20180428/0740Z – Himawari-8\nStart time of explosion and how determined: 20180428/0625Z – Satellite data(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.