(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20170808/2147Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current Aviation Color Code:	ORANGE
(5) Previous Aviation Color Code:	orange
(6) Source:	KVERT
(7) Notice Number:	2017-183
(8) Volcano Location:	N 56 deg 38 min E 161 deg 18 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	10768.24 ft (3283 m), the dome elevation ~8200 ft (2500 m)
(11) Volcanic Activity Summary:	According to video data by KVERT, eruption of Sheveluch volcano began from 16:31 UTC on 08 August, 2017. Explosions sent ash up to 10 km a.s.l., and ash cloud drift to the south-south-east from the volcano. At 21:20 UTC, front of ash cloud in size 220 km (longwise) is located for about 360 km to the south-southeast from the volcano. Explosive-extrusive eruption of the volcano continues. Ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	32800 ft (10000 m) AMSL Time and method of ash plume/cloud height determination: 20170808/1650Z – Himawari-8
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 224 mi (360 km) Direction of drift of ash plume/cloud of the volcano: S / azimuth 170 deg Time and method of ash plume/cloud determination: 20170808/2120Z – Himawari-8 Start time of explosion and how determined: 20170808/1631Z – Video data Duration of explosion: ~ 600 minutes
(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 Aviation Color Code is changes. VONAs are posted at http://www.kscnet.ru/ivs/kvert/index_eng.php. 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.