MASSIVE Volcano erupting in the northwest pacific Ocean 12/20/2017

A very large eruption has occurred at Bezymianny Volcano located in Kamchatka Russia in the Northwest Pacific Ocean, sending out a 50,000 foot blast. The last large eruption was in 1955, which was similar to that of Mount St. Helens in 1980. Prior to this eruption, Bezymianny volcano had been considered extinct.

Live webcams:

http://webcams.volcanodiscovery.com/Bezymianny

"Bezymianny ("unnamed") was considered extinct until it erupted violently in 1955-56, after a slumber of probably 1000 years. It is one of the most active volcanoes in Kamchatka. The eruption followed a massive flank failure (similar to Mt. St. Helens eruption in 1980) which removed a 0.5 sq km sector of the volcano.

Background:

The present-day Bezymianny volcano, lying next to its massive sisters Kamen and Kliuchevskoi, is a young and relatively small volcano only about 4700 years old. It was formed on top of an older volcano built between about 11,000-7000 years ago. 3 periods of intensified activity have been recognized in the geologic history during the past 3000 years. The present-day activity started with the eruption in 1955-56 after a 1000 year interval of repose. At the beginning of the eruption, the summit and a large sector of its flank failed and resulted in a catastrophic landslide followed by a powerful blast. The event left a large horseshoe-shaped crater. Since then, the volcano has been one of Kamchatka's most active. A new lava dome has been growing inside the 1956 crater, frequently producing explosive activity and pyroclastic flows. As of 2011, the lava dome has already largely filled the 1956 crater."

https://www.volcanodiscovery.com/bezymianny.html

"Volcanic ash advisories were issued reaching FL500 (Flight level 500) which equals approximately 50,000 feet, and is rare at any volcano for such a large blast to occur.

This is the largest (highest) blast on the planet in years that I know of."

Via Dutchsince:

https://www.dutchsinse.com/12-20-2017-very-large-50000-foot-high-15km-volcanic-eruption-in-northwest-pacific/

Full technical details of eruption:

http://www.kscnet.ru/ivs/kvert/index_eng.php

Bezymianny eruption 2017-12-20 03:55 UTC (local time December 20 15:55).

Height of ash plume ~ 15 km ASL extending to the N-E.

The webcam is located in seismic station, approximately 7 km (4.3 mi) East of Bezymianny volcano.

Please to make reference to Kamchatka Branch of the Geophysical Survey RAS (http://emsd.ru/) if used video.

(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued: 20171220/0447Z
(3) Volcano: Bezymianny (CAVW #300250)
(4) Current aviation colour code: RED
(5) Previous aviation colour code: red
(6) Source: KVERT
(7) Notice Number: 2017-269
(8) Volcano Location: N 55 deg 58 min E 160 deg 35 min
(9) Area: Kamchatka, Russia
(10) Summit Elevation: 9452.96 ft (2882 m)
(11) Volcanic Activity Summary:
According to satellite data by KVERT, ash plume on the height about 15 km a.s.l. drift for about 85 km to the north-east from the volcano.

Strong ash explosions up to 49,200 ft (15 km) a.s.l. occur at this time. Ongoing activity could affect international and low-flying aircraft.

(12) Volcanic cloud height:
49200 ft (15000 m) AMSL Time and method of ash plume/cloud height determination: 20171220/0420Z – Himawari-8

(13) Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 53 mi (85 km)
Direction of drift of ash plume/cloud of the volcano: NE / azimuth 53 deg

Time and method of ash plume/cloud determination: 20171220/0420Z – Himawari-8

Start time of explosion and how determined: 20171220/0341Z – Video data

(14) Remarks:

(15) Contacts:
Anton A. Nuzhdaev, IVS FEB RAS
[email protected]

Duty scientist: +79622825253

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