Udina
| Udina | ||
|---|---|---|
 Klyuchevskaya volcanic group, Udina on the right edge of the picture |
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| height | 2886 m | |
| location | Kamchatka ( Russia ) | |
| Coordinates | 55 ° 45 '30 " N , 160 ° 31' 36" E | |
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| Type | Stratovolcano | |
| rock | Andesite and basalt | |
| Last eruption | unknown | |
The Udina volcano massif ( Russian Удина ) extends from WNW to ESE at the southern end of the Klyuchevskaya volcanic group , southeast of the Tolbachik , and consists of two stratovolcanoes . In the west is the 2886 m high andesite Bolshaya Udina (Russian for Great Udina , height according to other information 2920 m), which carries a striking lava dome on its southwest flank . The 1945 m high, basaltic Malaya Udina (Russian for Little Udina ) is located at the eastern end of the Udina complex; there are also small lava domes on its flanks. Nothing is known about eruptions of the Udina complex in historical times. There are more than ten volcanoes within a radius of 20,000 meters, three of which are very active.
Between 1999 and September 2017 about 100 weak seismic events were registered under the Bolshaya Udina , after which an increase in seismicity began, with about 2400 seismic events between October 2017 and February 2019, the strongest with a magnitude of 4.3 in February 2019. A 2018 study of four temporary seismic stations and a tomographic survey in the area suggests the presence of magma with high levels of molten material and fluids , which would warrant a change in the current status of the volcano from "Extinct" to "Active". The registered seismicity clusters also indicate that magma from the reservoir that feeds the fissure eruptions of the Tolbachik may have paved its way towards the Bolshaya Udina .
A representative of the Russian Trofimuk Institute of Petroleum Geology and Geophysics spoke in June 2019 of a 50% probability of the Bolshaya Udina erupting , which is structurally similar to Besymjanny , which erupted again in 1955 after almost a thousand years of rest .
Web links
Individual evidence
- ↑ Information at peaklist.org
- ↑ Ivan Koulakov, Viktoria Komzeleva, Ilyas Abkadyrov, Yulia Kugaenko, Sami El Khrepy, Nassir Al Arifie: Unrest of the Udina volcano in Kamchatka inferred from the analysis of seismicity and seismic tomography . Journal of Volcanology and Geothermal Research, Vol. 379, 2019, pp. 45-59 (abstract)
- ^ CNN report, June 7, 2019