(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20221015/2119Z
(3) Volcano:	Chikurachki (CAVW #290360)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	green
(6) Source:	KVERT
(7) Notice Number:	2022-135
(8) Volcano Location:	N 50 deg 19 min E 155 deg 27 min
(9) Area:	Northern Kuriles, Russia
(10) Summit Elevation:	1816 m (5956.48 ft)
(11) Volcanic Activity Summary:	An explosive eruption began ~15:10 UTC on October 15 - an ash plume up to 4.5 km a.s.l. was noted on satellite images. Satellite data by KVERT showed an ash plume extended about 240 km to the east-south-east of the volcano. An activity 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:	4000-4500 m (13120-14760 ft) AMSL Time and method of ash plume/cloud height determination: 20221015/2030Z – Himawari-8 14m15
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 240 km (149 mi) Direction of drift of ash plume/cloud of the volcano: ESE / azimuth 106 deg Time and method of ash plume/cloud determination: 20221015/2030Z – Himawari-8 14m15 Start time of explosion and how determined: 20221015/1510Z – Satellite data
(14) Remarks:
(15) Contacts:	Alexander G. Manevich, IVS FEB RAS mag@kscnet.ru +74152202115 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.