(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
 (2) Issued:20160830/0304Z
 (3) Volcano:Chikurachki (CAVW #290360)
 (4) Current Aviation Color Code:YELLOW
 (5) Previous Aviation Color Code:green
 (6) Source:KVERT
 (7) Notice Number:2016-87
 (8) Volcano Location:N 50 deg 19 min E 155 deg 27 min
 (9) Area:Northern Kuriles, Russia
(10) Summit Elevation:5956.48 ft (1816 m)
(11) Volcanic Activity Summary:According to satellite data by KVERT, gas plume with ash is raising up to 2.5 km a.s.l. and extended about 35 km to the south-east from the volcano.

A moderate gas-steam activity of the volcano probably continues. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:8200 ft (2500 m) AMSL Time and method of ash plume/cloud height determination: 20160830/0144Z – MODIS AQUA (31m32)
(13) Other volcanic cloud information:Distance of ash plume/cloud of the volcano: 22 mi (35 km)
Direction of drift of ash plume/cloud of the volcano: SSE / azimuth 150 deg
Time and method of ash plume/cloud determination: 20160830/0144Z – MODIS AQUA (31m32)
(14) Remarks:
(15) Contacts: Dmitry V. Melnikov, IVS FEB RAS
dvm@kscnet.ru

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) FED RAS, is responsible for providing information on volcanic activity to international air navigation services for the airspace users.

CITATION GUIDELINES

For formal scientific citation of this VONA/KVERT Information Release, please use the following:
VONA/KVERT Information Release, August 30, 2016. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2016-87.
Aviation Color Codes

GREEN

Volcano is in normal, non-eruptive state

   or, after a change from a higher level: 

Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.

YELLOW

Volcano is experiencing signs of elevated unrest above known background levels. 

   or, after a change from higher level: 

Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

ORANGE

Volcano is exhibiting heightened unrest with increased likelihood of eruption.

   or,

Volcanic eruption is underway with no or minor ash emission.
[specify ash-plume height if possible]

RED

Eruption is forecast to be imminent with significant emission of ash into the atmosphere likely.

  or,

Eruption is underway with significant emission of ash into the atmosphere.
[specify ash-plume height if possible]