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Una Una Volcano

Updated: Mar 28, 2024 20:02 GMT -
stratovolcano 507 m / 1,663 ft
Sulawesi & Sangihe Islands (Indonesia), -0.17°S / 121.61°E
Current status: normal or dormant (1 out of 5)
Last update: 20 Dec 2021

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.

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Typical eruption style: Explosive
Una Una volcano eruptions: 1983, 1938, 1898-1900 (?)

Latest nearby earthquakes

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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.

Una Una Volcano Photos

Latest satellite images

UnaUna satellite image sat1UnaUna satellite image sat2
Mon, 2 Nov 2015, 06:58

Colo (Una Una) volcano, Sulawesi (Indonesia): alert level lowered to normal

Seismic activity at Colo Una Una volcano during the past months
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. ... Read all
Wed, 28 Oct 2015, 06:00

Colo volcano (Sulawesi, Indonesia) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 October-3 November 2015 (Continuing Activity)

PVMBG reported that seismicity at Colo declined during 1 September-25 October; 1-7 shallow-volcanic earthquakes and 1-3 volcanic earthquakes were recorded per day, which were rates similar to those recorded before a seismic increase in June. The Alert Level was lowered to 1 (on a scale of 1-4) on 26 October, and residents and tourists were warned not to approach the crater. ... Read all

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