VOLKAM18 EXERCISE EXERCISE EXERCISE VOLKAM18 EXERCISE EXERCISE \n\n (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) (2) Issued:20180419/2201Z (3) Volcano:Zheltovsky (CAVW #300040) (4) Current aviation colour code:RED (5) Previous aviation colour code:green (6) Source:KVERT (7) Notice Number:2018-0000 (8) Volcano Location:N 51 deg 34 min E 157 deg 19 min (9) Area:Kamchatka, Russia (10) Summit Elevation:6307.44 ft (1923 m)(11) Volcanic Activity Summary:Very strong explosive eruption of Zheltovsky volcano began at 21:45 UTC on April 19, 2018. According to satellite data, ash is reaching 45,000 ft (13.8 km) a.s.l. and ash plume is drifting to the southeast of the volcano on the height 45,000 ft (13.8 km) a.s.l. at this time. Ash emission is continuing.\n\nA strong explosive eruption of the volcano continues. Ongoing activity could affect international and low-flying aircraft. (12) Volcanic cloud height:45264-45264 ft (13800-13800 m) AMSL Time and method of ash plume/cloud height determination: 20180419/2145Z – NOAA 18 (4m5)(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 31 mi (50 km)\nDirection of drift of ash plume/cloud of the volcano: ESE / azimuth 120 deg \nTime and method of ash plume/cloud determination: 20180419/2145Z – NOAA 18 (4m5)\nStart time of explosion and how determined: 20180419/2145Z – Satellite data(14) Remarks:This strong explosive eruption is extremely hazardous for aircraft downwind. There was one known a strong explosive eruption of Zheltovsky volcano on 11 February, 1923. Zheltovsky volcano is not monitored with a seismic station. KVERT uses satellite data and sometimes visual observations by hikers and pilots reports to monitor this volcano.(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.VOLKAM18 EXERCISE EXERCISE EXERCISE VOLKAM18 EXERCISE EXERCISE \n\n