(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20230904/0754Z
(3) Volcano:	Klyuchevskoy (CAVW #300260)
(4) Current aviation colour code:	YELLOW
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2023-94
(8) Volcano Location:	N 56 deg 3 min E 160 deg 38 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	4750 m (15580 ft)
(11) Volcanic Activity Summary:	Video and satellite data by KVERT shows a strong wind lifts ash from the easthern slopes of Klyuchevskoy volcano, and a plume of resuspended ash is extending about 170 km to the east of the volcano. The summit explosive eruption of the volcano continues. Ash explosions up to 6 km (19,700 ft) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:	3000-3500 m (9840-11480 ft) AMSL Time and method of ash plume/cloud height determination: 20230904/0740Z – Video data
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 170 km (106 mi) Direction of drift of ash plume/cloud of the volcano: E / azimuth 83 deg Time and method of ash plume/cloud determination: 20230904/0720Z – Himawari-9 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.