Uratman
Stratovolcano in Russia
Key Facts
Elevation
678 m (2,224 ft)
Type
Stratovolcano
Location
47.120°, 152.250°
Region
Kuril Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
The northernmost of volcanoes on Simushir Island, Uratman 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 somma cone, andesitic Uratman, has grown during the Holocene in the SE part of the caldera. Two cinder cones are located along the N flank of Uratman, and a lava dome was formed on its NW flank along Brouton Bay.
No historical eruptions are known.
Volcanic Hazards & Risk Assessment
Primary Hazards
- Pyroclastic flows
- Lava flows
- Volcanic bombs and ballistics
- Lahars and mudflows
Risk Level
Geological Composition & Structure
Rock Types
Tectonic Setting
Age & Formation
Eruption Statistics & Analysis
| Metric | Value | Global Ranking | Significance |
|---|---|---|---|
| Total Recorded Eruptions | Unknown | Low | Moderately active volcano |
| Maximum VEI | VEI Unknown | Minor | Local impact potential |
| Recent Activity | Unknown | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Northwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 290191
- •Evidence: Evidence Credible
- •Epoch: Holocene
About the Photo
A large post-caldera cone (upper left) was constructed in the SE part of the Uratman caldera, the northernmost volcano on Simushir Island. The caldera is partially filled by Brouton Bay, shown here. Two cones and a lava dome are on the northern flank of the larger cone in this view from the NE caldera rim.
Photo by Yoshihiro Ishizuka, 2000 (Hokkaido University).
Authority Sources
Related Volcanoes
Basic Information
This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.