Kolokol Group
Stratovolcano in Russia
Key Facts
Elevation
1,328 m (4,357 ft)
Type
Stratovolcano
Location
46.042°, 150.083°
Region
Kuril Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
A group of Holocene volcanoes in central Urup Island is named after its most prominent volcano, Kolokol. Berg and Trezubetz volcanoes, flanking Kolokol on the NW, have breached summit calderas partially filled by lava domes. Trezubetz, whose name means "Trident," has an eroded crater rim with three large peaks when seen at sea from the north.
Kolokol is sometimes known as Urup-Fuji because of its symmetrical profile. The crater of Kolokol is not well preserved, but there is no evidence of glacial erosion. Several lava flows originate from Kolokol; one of these extends almost to the Sea of Okhotsk coast; a viscous lava flow armoring the SE flank is probably the most recent.
Borzov volcano, the oldest of the group, lies to the SW of Kolokol. Eruptions have been observed since the late-18th century. Berg volcano has been most active, but Trezubetz erupted in 1924.
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 | 53 years ago | Historical | Recently active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Northwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 290120
- •Evidence: Eruption Observed
- •Epoch: Holocene
About the Photo
A lava dome partially fills the summit caldera of Berg, with Kolokol in the background to the S. They are part of a group of Holocene volcanoes in central Urup Island that is named after the most prominent cone.
Photo courtesy of Alexandr Rybin (Institute of Marine Geology and Geophysics, Yuzhno-Sakhalin).
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.