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News
Seismic activity at Colo Una Una volcano during the past months
Monday, Nov 02, 2015
A recent period of volcanic unrest seems to be over. Seismic activity has decreased and VSI lowered its alert level back to green (normal) last week. [more]
 

Una Una volcano

stratovolcano 507 m / 1,663 ft
North Sulawesi & Sangihe Islands, Indonesia, -0.17°S / 121.61°E
Current status: dormant (1 out of 5)
Una Una volcano books
Last update: 2 Nov 2015
Typical eruption style: Explosive
Una Una volcano eruptions: 1983, 1938, 1898-1900 (?) No recent earthquakes
TimeMag. / DepthDistanceLocation
Una Una (also known as Colo) is an isolated volcano in the Gulf of Tomni, offshore central Sulawesi. It is the site of sulfur extraction.

Background:

Una Una volcano is a broad, low volcano containing a 2-km-wide caldera with a small central cone. Only 3 eruptions are known in historic time, but 2 of them caused extensive damage over much of the island. The last eruption of Una Una was in 1983 and produced pyroclastic flows that swept over most of the island shortly after all residents had been evacuated.

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