Tao-Rusyr Caldera

Photo of this volcano
Google Earth icon
  Google Earth Placemark
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 49.35°N
  • 154.7°E

  • 1325 m
    4346 ft

  • 290310
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Tao-Rusyr Caldera.

The Global Volcanism Program has no Weekly Reports available for Tao-Rusyr Caldera.

Index of Monthly Reports

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

04/1987 (SEAN 12:04) No fumarolic activity

Contents of Monthly Reports

All information contained in these reports is preliminary and subject to change.

04/1987 (SEAN 12:04) No fumarolic activity

During an aerial survey on 2 November 1986 the summit crater [of Krenitzyn] was covered with snow. There was no indication of fumarolic activity in the summit area or in the area of the 1952 E-flank eruption.

Information Contacts: G. Steinberg and B. Piskunov, Yuzhno-Sakhalinsk.

The 7.5-km-wide Tao-Rusyr caldera on southern Onekotan Island is one of the most impressive volcanoes of the Kuril Islands. The basaltic-to-andesitic caldera is filled by the deep-blue 7-km-wide Kal'tsevoe lake, whose surface is 400 m above sea level. The caldera was formed about 7500 years ago during one of the largest Holocene eruptions in the Kuril Islands. A large symmetrical post-caldera cone, 1325-m-high andesitic Krenitzyn Peak, forms a 4-km wide island that towers high above the caldera rim and fills the NW portion of the caldera lake. A 350-m-wide, 100-m-deep crater truncates the peak and a large lateral crater is located on the upper NE side. The only historical eruption of Krenitzyn Peak, in 1952, formed a small, mostly lacustral lava dome in an explosion crater along the east shore of the island.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1952 Nov 12 1952 Nov 19 Confirmed 3 Historical Observations Krenitzyn Peak (east flank)
5550 BCE ± 75 years Unknown Confirmed 6 Radiocarbon (uncorrected) Tao-Rusyr

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.

Blakiston | Kuroi | Kuroishi-dake | Kuroisi

Feature Name Feature Type Elevation Latitude Longitude
Krenitzyn Peak Stratovolcano 1324 m 49° 21' 0" N 154° 42' 0" E
Mednyi Stratovolcano 870 m

Feature Name Feature Type Elevation Latitude Longitude
Kryzhanovskii Caldera 550 m
A large symmetrical post-caldera cone, 1325-m-high Krenitzyn Peak, forms a 4-km wide island that towers above the rim of 7.5-km-wide Tao-Rusyr caldera. A 350-m-wide crater caps the peak, and a large shallow lateral crater (left center) is located on the upper NE flank. The small dark mass along the eastern shoreline (right-center) is a lava dome that was emplaced in 1952 during the only historical eruption of the volcano. Kal'tsevoe lake fills a caldera that was formed about 7500 years ago during one of the largest Holocene eruptions in the Kuril Islands.

Photo by Oleg Volynets (Institute of Volcanology, Petropavlovsk).
Summer snow remnants highlight dendritic drainages cutting pyroclastic-flow deposits on the flanks of Tao-Rusyr caldera on Onekotan Island in this NASA Space Shuttle image (with north to the left). The 7.5-km-wide caldera was formed about 7500 years ago accompanied by the eruption of 30-35 cu km of tephra during one of the largest Holocene eruptions of the Kuril Islands. Subsequently Krenitzyn Peak stratovolcano was constructed in the NW part of the caldera, reaching a height well above the caldera rim.

NASA Space Shuttle image ISS005-E-6518, 2002 (http://eol.jsc.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.

Gorshkov G S, 1958. Kurile Islands. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 7: 1-99.

Gorshkov G S, 1970. Volcanism and the Upper Mantle; Investigations in the Kurile Island Arc. New York: Plenum Publishing Corp, 385 p.

Volcano Types

Lava dome

Tectonic Setting

Subduction zone
Intermediate crust (15-25 km)

Rock Types

Andesite / Basaltic Andesite
Basalt / Picro-Basalt


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Affiliated Databases

Large Eruptions of Tao-Rusyr Caldera 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.