(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
(2) Issued: | 20221125/2333Z |
(3) Volcano: | Alaid (CAVW #290390) |
(4) Current aviation colour code: | ORANGE |
(5) Previous aviation colour code: | green |
(6) Source: | KVERT |
(7) Notice Number: | 2022-181 |
(8) Volcano Location: | N 50 deg 51 min E 155 deg 33 min |
(9) Area: | Northern Kuriles, Russia |
(10) Summit Elevation: | 2339 m (7671.92 ft) |
(11) Volcanic Activity Summary: | An explosive activity of the volcano continues. Satellite data by KVERT showed an ash plume extended about 38 km to the south-east of the volcano. A moderate eruptive activity of the volcano continues. Ash explosions up to 8 km (26,200 ft) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft. |
(12) Volcanic cloud height: | 4500-4700 m (14760-15416 ft) AMSL Time and method of ash plume/cloud height determination: 20221125/2225Z – NOAA-18 4m5 |
(13) Other volcanic cloud information: | Distance of ash plume/cloud of the volcano: 38 km (24 mi) Direction of drift of ash plume/cloud of the volcano: SE / azimuth 128 deg Time and method of ash plume/cloud determination: 20221126/2225Z – NOAA-19 4m5 |
(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 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. |
CITATION GUIDELINES For formal scientific citation of this VONA/KVERT Information Release, please use the following: VONA/KVERT Information Release, November 25, 2022. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2022-181. |
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. |
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. |