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Colo

Stratovolcano · Indonesia · 404m

Ash mantles the summit of Colo volcano after a powerful explosive eruption in 1983. The volcano forms the isolated island of Una-Una in the middle of the Gulf of Tomini in northern Sulawesi. The broad, low volcano is truncated by a 2-km-wide caldera that contains a small central cone. Only three eruptions have been recorded in historical time. The last eruption, in 1983, produced pyroclastic flows that swept over most of the island shortly after all residents had been evacuated.
Ash mantles the summit of Colo volcano after a powerful explosive eruption in 1983. The volcano forms the isolated island of Una-Una in the middle of the Gulf of Tomini in northern Sulawesi. The broad, low volcano is truncated by a 2-km-wide caldera that contains a small central cone. Only three eruptions have been recorded in historical time. The last eruption, in 1983, produced pyroclastic flows that swept over most of the island shortly after all residents had been evacuated. · Photo: Photo by M.S. Santoso, 1983 (Volcanological Survey of Indonesia). · Wikimedia Commons
Type
Stratovolcano
Country
Indonesia
Region
Western Pacific Volcanic Regions / Sangihe Volcanic Arc
Elevation
404m
Coordinates
-0.162, 121.601
Last eruption
1983
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Trachyandesite / Basaltic Trachyandesite
Geological summary

Colo volcano forms the isolated small island of Una Una in the middle of the Gulf of Tomini in northern Sulawesi. The broad, low volcano contains a 2-km-wide caldera with a small central cone. Three eruptions have been recorded since the late 1800's, but two of those caused widespread damage over the island. The last eruption, in 1983, produced pyroclastic flows that swept over most of the island shortly after all residents had been evacuated.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1898~1907 · 1 eruptions · max VEI 31932~1941 · 1 eruptions · max VEI 11975~1983 · 1 eruptions · max VEI 418981915194119581975

Detailed timeline

  1. 1983VEI 4Observed
    1983-07-18 – 1983-12-16
    Gunung Colo
  2. 1938 (±10 yrs)VEI 1Observed
    1938 – Ongoing
    Gunung Colo
  3. 1898VEI 3Observed
    1898-05-02 – 1900
    Gunung Colo

External links

⚠ For reference only. Not for emergency response.