| (1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) | |
| (2) Issued: | 20231117/0300Z |
| (3) Volcano: | Klyuchevskoy (CAVW #300260) |
| (4) Current aviation colour code: | GREEN |
| (5) Previous aviation colour code: | green |
| (6) Source: | KVERT |
| (7) Notice Number: | 2023-161 |
| (8) Volcano Location: | N 56 deg 3 min E 160 deg 38 min |
| (9) Area: | Kamchatka, Russia |
| (10) Summit Elevation: | 4750 m (15580 ft) |
| (11) Volcanic Activity Summary: | An eruption of the Klyuchevskoy volcano has ended, only fumarole activity of the summit crater is observed. However, a large hot lava flow lying in the Apakhonchichsky chute, continues to provoke the collapses of old pyroclastic material from the sides of the chute. Video and satellite data by KVERT shows a plume of resuspended ash is extending for 150 km to the east-south-east of the volcano. A fumarole activity of the summit crater of the Klyuchevskoy volcano is observed. However, collapses of old pyroclastic material from the sides of the Apakhonchichsky chute remains. Ongoing activity could affect low-flying aircraft. |
| (12) Volcanic cloud height: | 4000-4500 m (13120-14760 ft) AMSL Time and method of ash plume/cloud height determination: 20231117/0230Z – Himawari-9 14m15 |
| (13) Other volcanic cloud information: | Distance of ash plume/cloud of the volcano: 150 km (93 mi) Direction of drift of ash plume/cloud of the volcano: ESE / azimuth 107 deg Time and method of ash plume/cloud determination: 20231117/0230Z – Himawari-9 14m15 |
| (14) Remarks: | |
| (15) Contacts: | Alexander G. Manevich, IVS FEB RAS mag@kscnet.ru +74152202115 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 17, 2023. KVERT, Institute of Volcanology and Seismology FEB RAS. URL: http://www.kscnet.ru/ivs/kvert/van/?n=2023-161. |
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| 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. |