Sinabung & Tungurahua
During the night two large events took place. The first is the deadly collapse with a following pyroclastic flow that struck at Sinabung; the second is the powerful eruption that started at Tungurahua.
In a decision that I guess will be hotly debated for some time the Indonesian mitigation authority decided to lower their risk assessment for the volcano and letting people back into the 7km exclusion zone due to the diminished activity at the volcano. In the end they settled for a 5 km exclusion zone, and it is rumored that not even that distance was upheld in places.
During the last couple of weeks an 800 meter long lobe of brittle and very slow moving magma had formed down the valley that the pyroclastic flows has followed so far. This meant that the pyroclastic flows started from a lower point and thusly had less power and travelled…
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