Mount Colo

Colo is a stratovolcano in Indonesia. It forms the small island of Una-Una at the middle of the Gulf of Tomini, the northern part of Sulawesi. The volcano is broad and has a low profile with only 507 m above the sea level. It contains a 2 km wide caldera with a small volcanic cone inside. Only three eruptions have been recorded in the history with two of them causing damage.

1898 eruption
The eruption had a VEI of 3, qualifying as 'severe'. It involved: The island was evacuated, and there was damage to property.
 * Central vent eruption
 * Crater lake eruption(?)
 * Explosive eruption
 * Lahars

1983 eruption
This eruption was more violent and had a VEI of 4. It involved:


 * Central vent eruption
 * Explosive eruption
 * Pyroclastic flow(s)
 * Phreatic explosion

The island was evacuated, and there was damage to property, but there were no deaths.