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 metres (1,663 ft) above the sea level.

It contains a 2 kilometres (1.2 mi) wide caldera with a small volcanic cone inside.

Only three eruptions have been recorded in the history with two of them causing damage.

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