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Udina () is a volcanic
massif
A massif () is a principal mountain mass, such as a compact portion of a mountain range, containing one or more summits (e.g. France's Massif Central). In mountaineering literature, ''massif'' is frequently used to denote the main mass of an ...
located in the central part of the Kamchatka Peninsula, Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
. It comprises two distinct conical stratovolcanoes: Bolshaya Udina, standing at 2,920 meters, and Malaya Udina, with a height of 1,945 meters.
Malaya Udina, the smaller of the two, is a basaltic
Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron ( mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% ...
volcano located at the eastern end of the complex, rising above a low saddle. Its flanks are dotted with small lava domes, characteristic of its formation. This volcano is part of the Volcanoes of Kamchatka, a UNESCO World Heritage site, recognized for its geological significance and natural beauty.
Bolshaya Udina, the larger and western volcano, is composed primarily of andesitic rock and features a prominent lava dome on its southwestern flank. Although it was long considered extinct, Bolshaya Udina surprised the scientific community when it exhibited signs of seismic activity, leading to its reclassification as an 'active' volcano in June 2019. This reawakening has drawn attention to the potential hazards associated with the volcano, as well as the dynamic nature of the region's volcanic activity.
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See also
*List of volcanoes in Russia
This is a list of active and extinct volcanoes in Russia.
European Russia
Kamchatka
Volcanoes of the Kamchatka Peninsula of the northwestern Pacific Ocean and the Russian Far East.
Kuril Islands
Volcanoes of the Kuril Islands, in the ...
* List of ultras of Northeast Asia
References
External links
* Mountains of the Kamchatka Peninsula Volcanoes of the Kamchatka Peninsula Stratovolcanoes of Russia {{KamchatkaKrai-geo-stub