(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20180428/0833Z
(3) Volcano:	Karymsky (CAVW #300130)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	green
(6) Source:	KVERT
(7) Notice Number:	2018-40
(8) Volcano Location:	N 54 deg 2 min E 159 deg 26 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	4874.08 ft (1486 m)
(11) Volcanic Activity Summary:	According to satellite data, a moderate explosive activity of Karymsky volcano renew from about 06:25 UTC on April 28. Ash explosions sent ash up to 5.5 km a.s.l., ash plume drifted about 150 km to the north-east from the volcano. A moderate eruptive activity of the volcano continues. Ash explosions up to 16,400-19,700 ft (5-6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:	18040-18040 ft (5500-5500 m) AMSL Time and method of ash plume/cloud height determination: 20180428/0630Z – Himawari-8
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 93 mi (150 km) Direction of drift of ash plume/cloud of the volcano: NE / azimuth 47 deg Time and method of ash plume/cloud determination: 20180428/0740Z – Himawari-8 Start time of explosion and how determined: 20180428/0625Z – Satellite data
(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/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.