(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
 (2) Issued:20201129/0414Z
 (3) Volcano:Klyuchevskoy (CAVW #300260)
 (4) Current aviation colour code:ORANGE
 (5) Previous aviation colour code:orange
 (6) Source:KVERT
 (7) Notice Number:2020-222
 (8) Volcano Location:N 56 deg 3 min E 160 deg 38 min
 (9) Area:Kamchatka, Russia
(10) Summit Elevation:15580 ft (4750 m)
(11) Volcanic Activity Summary:A moderate explosive-effusive eruption of the volcano continues. According to video and satellite data, an ash plume on the height of 5.5-6.0 km a.s.l. is extending for 300 km to the east of the volcano.

A moderate explosive-effusive eruption of the volcano continues. Ash explosions up to 23,000-26,200 ft (7-8 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:18040-19680 ft (5500-6000 m) AMSL Time and method of ash plume/cloud height determination: 20201129/0410Z – Video data
(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 186 mi (300 km)
Direction of drift of ash plume/cloud of the volcano: ENE / azimuth 78 deg
Time and method of ash plume/cloud determination: 20201129/0203Z – JPSS-1 (14m15)
(14) Remarks:
(15) Contacts: Dmitry V. Melnikov, IVS FEB RAS
dvm@kscnet.ru

Duty 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/.

In 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.