Kolokol Group

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 46.042°N
  • 150.05°E

  • 1328 m
    4356 ft

  • 290120
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

26 August-1 September 2009

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)



 Available Weekly Reports


2009: August


26 August-1 September 2009

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)


Summary of 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

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. 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. Additional discussion of data sources can be found under Volcano Data Criteria.

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.

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 volcano rises to 1328 m and is sometimes known as Urup-Fuji because of its symmetrical profile. The crater of Kolokol is not well preserved, but the volcano displays 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 from Kolokol. Borzov volcano, the oldest of the group, lies to the SW of Kolokol. Eruptions of the Kolokol volcano group have been observed in historical time since the late-18th century. Berg volcano has been most active, but Trezubetz erupted in 1924.