Ichinsky

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 55.68°N
  • 157.73°E

  • 3621 m
    11877 ft

  • 300280
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Ichinsky.

The Global Volcanism Program has no Weekly Reports available for Ichinsky.

The Global Volcanism Program has no Bulletin Reports available for Ichinsky.

Ichinsky, by far the highest peak in the Sredinny Range, is a massive, 450 cu km stratovolcano that is one of Kamchatka's largest. The andesitic Pleistocene-to-Holocene stratovolcano, also known as Icha volcano, contains a 3 x 5 km-wide glacier-covered summit caldera filled by a large post-caldera edifice. Two glacier-capped lava domes form the highest peaks of 3621-m-high Ichinsky. A dozen late-Pleistocene to Holocene dacitic and rhyodacitic lava domes circle the peak below the caldera rim, at elevations of 1800-3000 m. Fresh-looking basaltic-to-dacitic lava flows, some with prominent flow ridges, were erupted from flank vents and traveled up to 10-15 km. The largest Holocene eruption of Ichinsky volcano took place about 6500 years ago, producing block-and-ash flows that traveled up to 15 km. Fumarolic activity occurs within the caldera and on the lower northern flank. In 1956 steam jets rose 250 m above the caldera fumarole field.

Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1740 Unknown Confirmed 0 Historical Observations SSW flank
1300 ± 200 years Unknown Confirmed   Radiocarbon (corrected)
0800 ± 300 years Unknown Confirmed   Radiocarbon (corrected)
0550 (?) Unknown Confirmed   Tephrochronology
0050 ± 300 years Unknown Confirmed   Radiocarbon (corrected)
0600 BCE (?) Unknown Confirmed   Tephrochronology
1200 BCE (?) Unknown Confirmed   Tephrochronology
1950 BCE ± 300 years Unknown Confirmed   Radiocarbon (corrected)
2850 BCE ± 300 years Unknown Confirmed   Radiocarbon (corrected)
5400 BCE (?) Unknown Confirmed 5 Tephrochronology SW flank
5650 BCE (?) Unknown Confirmed   Tephrochronology
5850 BCE (?) Unknown Confirmed   Tephrochronology
6150 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected)
6950 BCE (?) Unknown Confirmed   Tephrochronology

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.



Synonyms
Icha | Alnei | Hoashen | Belaia Sopka | Sopochnaia | Alianngei | Akhlan | Kaolkhon | Kotkhlonga | Uachlar | Fleallin | Hweiain | Hfealin | Itschinskij | Sopotschnaja | Aljanngej | Achlan | Kolchon | Chfealin | Cweajain | Khoashen | Choaschen | Kotchlonga | Uakhlar
Ichinsky is the highest peak in Kamchatka's Sredinny Range, which extends along the western side of the peninsula. The 3621-m-high summit cone of the massive stratovolcano, seen here from the south, was constructed within a 3 x 5 km-wide glacier-covered caldera. A dozen late-Pleistocene to Holocene dacitic and rhyodacitic lava domes circle the peak below the caldera rim, at elevations of 1800-3000 m. Fumarolic activity occurs within the caldera and on the lower northern flank.

Photo by Oleg Volynets, 1977 (Institute of Volcanology, Petropavlovsk).
The setting sun gilds the SW flank of Ichinsky, the most prominent volcano of the Sredinny Range. Two glacier-covered lava domes form the summit of the volcano. The massive stratovolcano is one of the largest volume volcanoes in Kamchatka. No historical eruptions are known from Ichinsky, but Holocene eruptions have produced dactic-to-rhyodacitic lava domes and voluminous basaltic-to-andesitic lava flows from flank vents.

Photo by Oleg Volynets, 1977 (Institute of Volcanology, Petropavlovsk).

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.

Fedotov S A, Masurenkov Y P (eds), 1991. Active Volcanoes of Kamchatka. Moscow: Nauka Pub, 2 volumes.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

Kozhemyaka N N, 1995. Active volcanoes of Kamchatka: types and growth time of cones, total volumes of erupted material, productivity, and composition of rocks. Volc Seism, 16: 581-594 (English translation).

Pevzner M M, 2004a. The first geolgical data on the chronology of Holocene eruptive activity in the Ichinskii volcano (Sredinnyi Ridge, Kamchatka). Trans (Doklady) USSR Acad Sci Earth Sci, 395: 507-510.

Vlodavetz V I, Piip B I, 1959. Kamchatka and Continental Areas of Asia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 8: 1-110.

Volcano Types

Stratovolcano
Caldera
Lava dome(s)
Cinder cone(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt
Andesite / Basaltic Andesite
Minor
Dacite
Rhyolite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
34
2,670

Affiliated Databases

Large Eruptions of Ichinsky Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.