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Seismic activity at Soputan over the past year (red lines=explosion signals, guguran=avalanche signals)
The volcano has remained calm since its last eruption on 6-7 February, but continues to show significant signs of unrest. Its alert level is being maintained at 3 on the Indonesian scale of 1-4.
Visual activity during the past weeks consisted in degassing, producing a plume that rose 25-75 meters, and rock avalanches from the lava dome that indicate that magma supply continues into the dome at slow rate.
An exclusion zone of 4 km radius from the summit is in place and increased to 6.5 km towards the western sector. River beds draining from the volcano in particular should be avoided due to the elevated risk of lahars (mud flows) during rainfall.
Courtesy of volcanodiscovery.com
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