(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20231016/0338Z
(3) Volcano:	Klyuchevskoy (CAVW #300260)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2023-112
(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 summit explosive-effusive eruption of the volcano continues. Against the background of explosive activity of the Strombolian type (lava fountaining in the volcanic crater), the lava flows continue to effuse along the Apakhonchichsky chute on the southeastern slope of the volcano. Lava flows in the Apakhonchichsky chute melt buried snowfields and glaciers. Powerful phreatic explosions are observed in the Apakhonchichsky chute, and large collapses of pyroclastic material from its sides. Satellite data by KVERT showed an ash plume is extending for 70 km to the northeast of the volcano. The summit explosive-effusive eruption of the volcano continues. Ash explosions up to 7-8 km (23,000-26,240 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	6500-7000 m (21320-22960 ft) AMSL Time and method of ash plume/cloud height determination: 20231016/0330Z – Video data
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 70 km (43 mi) Direction of drift of ash plume/cloud of the volcano: ENE / azimuth 65 deg Time and method of ash plume/cloud determination: 20231016/0300Z – Himawari-9 14m15
(14) Remarks:
(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.