(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20231103/0516Z
(3) Volcano:	Klyuchevskoy (CAVW #300260)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2023-150
(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:	The eruptive activity of Klyuchevskoy volcano continues, an ash plume is extending for 144 km to the east-northeast of the volcano. The summit explosive-effusive eruption of the volcano continues. A danger of ash explosions up to 7-8 km (23,000-26,200 ft) a.s.l. remains. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	6000-6500 m (19680-21320 ft) AMSL Time and method of ash plume/cloud height determination: 20231103/0430Z – Himawari-9 14m15
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 144 km (89 mi) Direction of drift of ash plume/cloud of the volcano: ENE / azimuth 71 deg Time and method of ash plume/cloud determination: 20231103/0430Z – Himawari-9 14m15
(14) Remarks:	An edge of ash cloud of the paroxysmal phase of the Klyuchevskoy eruption extended more than 3200 km to the east-southeast of the volcano.
(15) Contacts:	Dr. Olga A. Girina, Head of KVERT, IVS FEB RAS girina@kscnet.ru +74152202044 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.