Kolokol Group

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 46.042°N
  • 150.05°E

  • 1328 m
    4356 ft

  • 290120
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 26 August-1 September 2009 Citation IconCite this Report


Based on analyses of satellite imagery, SVERT reported that on 26 August a gas-and-steam plume possibly containing ash rose from Berg (part of the Kolokol Group of volcanoes) to an altitude greater than 6 km (19,700 ft) a.s.l. and drifted NE.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)


Most Recent Bulletin Report: April 1987 (SEAN 12:04) Citation IconCite this Report


Weak gas emission from the Berg and Trezubetz domes

Weak gas emission from the extrusive domes at Berg and Trezubetz was noted during a 6 November overflight. Five explosive eruptions and one dome-building episode are known between 1845 and 1970.

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

Weekly Reports - Index


2009: August


26 August-1 September 2009 Citation IconCite this Report


Based on analyses of satellite imagery, SVERT reported that on 26 August a gas-and-steam plume possibly containing ash rose from Berg (part of the Kolokol Group of volcanoes) to an altitude greater than 6 km (19,700 ft) a.s.l. and drifted NE.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)


Bulletin Reports - Index


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.

12/1981 (SEAN 06:12) Weak gas release from the Berg and Trezubetz summit domes

04/1987 (SEAN 12:04) Weak gas emission from the Berg and Trezubetz domes




Information is preliminary and subject to change. All times are local (unless otherwise noted)


December 1981 (SEAN 06:12) Citation IconCite this Report


Weak gas release from the Berg and Trezubetz summit domes

Very weak gas emission was occurring from the summits of extrusive domes at both Berg and Trezubetz during the 20 September 1981 flight.

Information Contacts: G. Steinberg, Sakhalin Complex Institute.


April 1987 (SEAN 12:04) Citation IconCite this Report


Weak gas emission from the Berg and Trezubetz domes

Weak gas emission from the extrusive domes at Berg and Trezubetz was noted during a 6 November overflight. Five explosive eruptions and one dome-building episode are known between 1845 and 1970.

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

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 2009 Aug 26 ] [ Unknown ] Uncertain 2   Berg
[ 2005 ] [ Unknown ] Uncertain 1   Berg
1973 Jul 25 1973 Jul 26 (?) Confirmed 1 Historical Observations Berg (northern part of lava dome)
1970 Feb 1970 Mar Confirmed 3 Historical Observations Berg
1952 Jan 15 ± 45 days Unknown Confirmed 2 Historical Observations Berg
1946 Apr 15 ± 45 days Unknown Confirmed 2 Historical Observations Berg
1940 ± 6 years Unknown Confirmed   Historical Observations Berg
1924 Mar 13 Unknown Confirmed 2 Historical Observations Trezubetz
1894 Jul 25 1894 Jul 26 Confirmed 2 Historical Observations Berg ?
1845 1846 Confirmed 2 Historical Observations Berg
1780 ± 10 years Unknown Confirmed 2 Historical Observations

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.

Photo Gallery


Berg volcano, seen here from the SE, is part of a closely spaced group of Holocene volcanoes in central Urup Island that is named after its most prominent symmetrical volcano, Kolokol. Berg, which has a 2-km-wide caldera breached to the NW that contains a large lava dome, is the most recently active of the group. Steam rises from an explosion crater on the NW side of the 250-m-high lava dome and a prominent explosion crater (center) cuts its southern side. Eruptions of Berg have been documented since the late-18th century.

Photo by A. Samoluk, 1990 (courtesy of Genrich Steinberg, Institute for Marine Geology and Geophysics, Yuzhno-Sakhalinsk).
See title for photo information.
A steaming lava dome partially fills the breached summit caldera of Berg volcano, with conical Kolokol volcano in the background to the south. They are part of a group of Holocene volcanoes in central Urup Island that 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. Kolokol volcano rises to 1328 m and is sometimes known as Urup-Fuji because of its symmetrical profile.

Photo courtesy of Alexandr Rybin (Institute of Marine Geology and Geophysics, Yuzhno-Sakhalin).
See title for photo information.

Smithsonian Sample Collections Database


The following 1 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 117640-2 Andesite

Affiliated Sites