(1) KVERT VOLCANIC ACTIVITY NOTICE (VAN)
 (2) Issued:20260928/2204Z
 (3) Volcano:Chikurachki (CAVW #290360)
 (4) Current aviation colour code:YELLOW
 (5) Previous aviation colour code:orange
 (6) Source:KVERT
 (7) Notice Number:2026-102
 (8) Volcano Location:N 50 deg 19 min E 155 deg 28 min
 (9) Area:Northern Kuriles, Russia
(10) Summit Elevation:1816 m (5956.48 ft)
(11) Volcanic Activity Summary:Explosive eruption occurred on 18:30 UTC on 20 September, 2026. No more explosions were observed since this day.

An activity of the volcano continues. Ongoing activity could affect low-flying aircraft.
(12) Volcanic cloud height:NO ASH CLOUD PRODUCED
(13) Other volcanic cloud information:NO ASH CLOUD PRODUCED
(14) Remarks:
(15) Contacts: Alexander G. Manevich, IVS FEB RAS, mag@kscnet.ru, +74152202115

Duty scientist: +79622825253
(16) Next Notice:A new Notice will be issued if conditions change significantly or the colour code is changed. Notices are posted at http://kvert.febras.net.

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.

CITATION GUIDELINES

For formal scientific citation of this KVERT Volcanic Activity Notice, please use the following:
KVERT Volcanic Activity Notice, сентября 28, 2026. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://kvert.febras.net/van/?n=2026-102.
Aviation Colour 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]

UNASSIGNED

There is insufficient information available to assess the current status of the volcano or volcanic activity.