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The Global Volcanism Program has no activity reports for Uksichan.
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Uksichan is a massive, gently dipping shield volcano that covers 1850 sq km. Its 300 cu km volume makes it the largest volcano of the Sredinny Range. Uksichan is truncated by a 12-km-wide summit caldera that is mostly filled by several dacitic lava domes. The largest of these rises 900 m above the caldera floor to form the 1692-m-high summit of the volcano. Initial lava flows traveled up to 15-20 km, but later flows are thicker and more viscous. In contrast to the western and NW flanks, which consist exclusively of lava flows, the eastern and SE flanks contain substantial amounts of pyroclastic material. Late-Quaternary cinder cones and Icelandic-type shield volcanoes are located on the flanks of the volcano. Early geologic studies in the Sredinny Range (Ogorodov et al., 1972) identified numerous Holocene eruptive centers based primarily on morphological criteria. However, later work has suggested that Sredinny Range volcanoes are less mantled by Holocene tephras than eastern Kamchatka volcanoes and therefore appear more youthful, so that Holocene eruptions are uncertain for many of these Sredinny Range eruptive vents.
The Global Volcanism Program is not aware of any Holocene eruptions from Uksichan. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Uksichan page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|Feature Name||Feature Type||Elevation||Latitude||Longitude|
|Bunanya||Shield volcano||1527 m|
|Chingeingein||Shield volcano||1922 m||56° 9' 0" N||158° 18' 0" E|
|Kuyup||Shield volcano||1453 m||56° 8' 0" N||158° 26' 0" E|
|Zbev-Bunanya||Shield volcano||1530 m|
|Arcuate green valleys in the center of this NASA Landsat composite image (with north to the top) drain the 12-km-wide summit caldera of Uksichan volcano. This massive, gently dipping shield volcano covers 1850 sq km and is the largest volcano of the Sredinny Range. Several dacitic lava domes occupy the caldera floor. Late-Quaternary cinder cones and Icelandic-type shield volcanoes are located on the flanks of the volcano. The largest of these, the snow-dappled darker area above and to the left of the caldera, lies on the NW caldera rim.
NASA Landsat7 image (worldwind.arc.nasa.gov)
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Erlich E N, 1986. Geology of the calderas of Kamchatka and Kurile Islands with comparison to calderas of Japan and the Aleutians, Alaska. U S Geol Surv Open-File Rpt, 86-291: 1-300.
Erlich E N, Gorshkov G S (eds), 1979. Quaternary volcanism and tectonics in Kamchatka. Bull Volc, 42:1-4.
IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..
Ogorodov N V, Kozhemyaka N N, Vazheevskaya A A, Ogorodov A S, 1972. Volcanoes and the Quaternary Volcanism of the Sredinny Ridge in Kamchatka. Moscow: Nauka Pub, 190 p (in Russian).
Ponomareva V V, 2001. . (pers. comm.).