Batu Tara volcano Nov 2014: pyroclastic flow

A pyroclastic flow occurred early on 4 Nov (local time): at around 2 am local time, a powerful explosion was immediately followed by a short lava-rich, fountain-like explosion that initiated a large incandescent avalanche over the whole width of the sciara, causing also some parts of the upper dome to collapse.
The avalanche turned into a small pyroclastic flow that reached the shore of the sciara and continued above water for approx. 100 m.
Andi and Till managed to capture the event on camera:
4 Nov, 01:59 local time: a relatively strong explosion occurs. (Photo: Tilmann)
4 Nov, 01:59 local time: a relatively strong explosion occurs. (Photo: Tilmann) [info]
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02:00: a very unusual eruption starts - very rich in spatter, almost like a lava fountain. (Photo: Tilmann)
02:00: a very unusual eruption starts - very rich in spatter, almost like a lava fountain. (Photo: T... [info]
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Seconds later: Collapsing lava from the explosion and parts of the dome start to slide down the sciara, turning into a dense, turbulent mixture of lava blocks and ash - a pyroclastic flow. (Photo: Tilmann)
Seconds later: Collapsing lava from the explosion and parts of the dome start to slide down the scia... [info]
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02:01 local time: a minute later, the flow has already descended the sciara and traveled approx. 100-200 m above the sea, leaving a large dark ash plume rising above it and a glowing delta, which remained hot until the next morning. (Photo: Andi / VolcanoDiscovery Indonesia)
02:01 local time: a minute later, the flow has already descended the sciara and traveled approx. 100... [info]
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The ash plume rising from the pyroclastic flow. (Photo: Andi / VolcanoDiscovery Indonesia)
The ash plume rising from the pyroclastic flow. (Photo: Andi / VolcanoDiscovery Indonesia) [info]
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Wind blows the ash plume away from us, fortunately. (Photo: Andi / VolcanoDiscovery Indonesia)
Wind blows the ash plume away from us, fortunately. (Photo: Andi / VolcanoDiscovery Indonesia) [info]
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Strong explosions continue to occur the rest of the night and until the morning. Sometimes, bombs are thrown into the sea. (Photo: Tilmann)
Strong explosions continue to occur the rest of the night and until the morning. Sometimes, bombs ar... [info]
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Phases of near-continuous glowing rockfalls on the sciara originate from the glowing dome during phases of increased effusive activity, which lasted up to 20-30 minutes. (Photo: Tilmann)
Phases of near-continuous glowing rockfalls on the sciara originate from the glowing dome during pha... [info]
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