(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20180917/2227Z (3) Volcano:Sarychev Peak (CAVW #290240) (4) Current aviation colour code:ORANGE (5) Previous aviation colour code:orange (6) Source:KVERT (7) Notice Number:2018-90 (8) Volcano Location:N 48 deg 5 min E 153 deg 12 min (9) Area:Central Kuriles, Russia (10) Summit Elevation:4906.88 ft (1496 m)(11) Volcanic Activity Summary:An eruptive activity of the volcano continues. According to visual data from Matua Island, explosions sent ash up to 4.5 km a.s.l. at 22:10 UTC on 17 September; an ash cloud drift to the north-east from the volcano.\n\nAn eruptive 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:14760 ft (4500 m) AMSL Time and method of ash plume/cloud height determination: 20180917/2210Z – Visual data(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 3 mi (5 km)\nDirection of drift of ash plume/cloud of the volcano: NE\nTime and method of ash plume/cloud determination: 20180917/2210Z – Visual 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.