(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:	20210411/0700Z
(3) Volcano:	Karymsky (CAVW #300130)
(4) Current aviation colour code:	ORANGE
(5) Previous aviation colour code:	orange
(6) Source:	KVERT
(7) Notice Number:	2021-48
(8) Volcano Location:	N 54 deg 2 min E 159 deg 26 min
(9) Area:	Kamchatka, Russia
(10) Summit Elevation:	1486 m (4874.08 ft)
(11) Volcanic Activity Summary:	According to Tokyo VAAC data, and satellite data by KVERT, explosions sent ash up to 4 km a.s.l. at 05:45 UTC on 11 April. Ash plume continues to drift to the south-east of the volcano. A moderate explosive-effusive eruption of the volcano continues. Ash explosions up to 8-9 km (23,000-29,500 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
(12) Volcanic cloud height:	3500-4000 m (11480-13120 ft) AMSL Time and method of ash plume/cloud height determination: 20210411/0545Z – Himawari-8
(13) Other volcanic cloud information:	Distance of ash plume/cloud of the volcano: 67 km (42 mi) Direction of drift of ash plume/cloud of the volcano: SE / azimuth 140 deg Time and method of ash plume/cloud determination: 20210411/0630Z – Himawari-8 Start time of explosion and how determined: 20210411/0545Z – 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/. 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.