(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20170516/0912Z
(3) Volcano:	Sheveluch (CAVW #300270)
(4) Current Aviation Color Code:	ORANGE
(5) Previous Aviation Color Code:	red
(6) Source:	KVERT
(7) Notice Number:	2017-81
(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:	The strong explosive event of the volcano has finished. According to satellite data, a thermal anomaly is observing over the volcano but no ash emission is noting from the volcano at this time. Big ash cloud in size 51x43 km (at 0830 UTC) continues to move to the east from the volcano. Explosive-extrusive eruption of the volcano continues. Ash explosions up to 26,200-32,800 ft (8-10 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	NO ASH CLOUD PRODUSED
(13) Other volcanic cloud information:	NO ASH CLOUD PRODUSED
(14) Remarks:	According to VAAC Tokyo forecast, at 0905 UTC on May 16, the ash cloud continues to move to the east of the volcano (FL400). See please the VAAC Tokyo VAA/VAG and SIGMETs for current ash cloud information.
(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.