(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
 (2) Issued:20160804/0124Z
 (3) Volcano:Chikurachki (CAVW #290360)
 (4) Current Aviation Color Code:GREEN
 (5) Previous Aviation Color Code:yellow
 (6) Source:KVERT
 (7) Notice Number:2016-78
 (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:A moderate explosive eruption of Chikurachki volcano was observing on 27-28 July, 2016. Ash plumes rose up to 4-5 km a.s.l. and extended to the north-east from the volcano in these days. Weak ashfalls was registered at Severo-Kurilsk (Paramushir Island) on 27 July. The volcano was quiet from 28 July till present. Chikurachki volcano is not monitored with seismic instruments. KVERT has satellite monitoring and receives occasional visual observations of this volcano. KVERT continues to monitor Chikurachki volcano.

Fumarole activity of the volcano probably continues. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:NO ASH CLOUD PRODUSED
(13) Other volcanic cloud information:NO ASH CLOUD PRODUSED
(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) 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 04, 2016. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2016-78.
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]