Urataman

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 47.12°N
  • 152.25°E

  • 678 m
    2224 ft

  • 290191
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Urataman.

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

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

The northernmost of six Quaternary volcanoes on Simushir Island, Urataman consists of an impressive 7.5-km-wide Pleistocene caldera that forms the NE tip of the island. Caldera walls rise 450 m above a 250-m-deep caldera bay. A narrow gap in the northern caldera rim provides sea-water access into the half-moon-shaped Brouton Bay, which fills the NW half of the caldera. A central cone, andesitic Urataman volcano, has grown to a height of 678 m during the Holocene in the SE part of the caldera. Two cinder cones are located along the northern flank of Urataman, and a lava dome was formed on its NW flank along Brouton Bay. No historical eruptions are known from Urataman.

The Global Volcanism Program is not aware of any Holocene eruptions from Urataman. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Urataman 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.


Craters

Feature Name Feature Type Elevation Latitude Longitude
Brouton Caldera Caldera 450 m
A composite panorama from the NE rim of Brouton caldera on Urataman volcano shows the crescent-shaped Brouton Bay, which fills the caldera floor through a narrow gap in the NNE caldera rim (right). A small settlement on the NE shore of the bay lies at the foot of Urataman, a central cone constructed in the SE part of the caldera. The 7.5-km-wide caldera was formed during the Pleistocene.

Photo by Yoshihiro Ishizuka, 2000 (Hokkaido University).
A large post-caldera central cone (upper left) was constructed in the SE part of the caldera of Urataman volcano, the northernmost of six Quaternary volcanoes on Simushir Island. Urataman consists of a 7.5-km-wide Pleistocene caldera that forms the NE tip of the island. The walls of the caldera rise 450 m above a 250-m-deep caldera floor, partially filled by the half-moon-shaped Brouton Bay. Two cinder cones and a lava dome are seen on the northern flank of the cental cone along Brouton Bay in this view from the NE caldera rim.

Photo by Yoshihiro Ishizuka, 2000 (Hokkaido University).
A narrow gap in the NNE rim of Brouton caldera on Urataman volcano allows access of the sea into Brouton Bay. The caldera floor lies 250 m beneath the sea surface, and the rim rises 450 m above it. The caldera was formed during the Pleistocene.

Photo by Yoshihiro Ishizuka, 2000 (Hokkaido University).
A narrow gap in the NNE rim of 7.5-km-wide Pleistocene Brouton caldera on Urataman volcano in the Kuril Islands allows access of the sea into Brouton Bay. The caldera floor lies 250 m beneath the sea surface, and the rim rises 450 m above it. A central cone, andesitic Urataman volcano, has grown to a height of 678 m during the Holocene in the SE part of the caldera.

NASA Space Shuttle image ISS005-E-6514, 2002.

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

Volcano Types

Somma
Stratovolcano
Pyroclastic cone(s)
Lava dome

Tectonic Setting

Subduction zone
Oceanic crust (< 15 km)

Rock Types

Major
Andesite / Basaltic Andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
3
9
20
33

Affiliated Databases

Large Eruptions of Urataman 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.