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Glowing avalanche from Sinabung today or yesterday and current seismic recording at the volcano observatory (images: PVMBG)
The volcano has been producing a series of glowing avalanches and pyroclastic flows on the ESE and SE sides during the past 24 hours, reaching lengths of 1500-3500 m.
The cause of the current violent phase is likely that the prominent viscous lava lobe that has been spilling over from the summit dome into a steep ravine of the upper flank has now become too unstable and is crumbling apart.
During this process, rockfalls can turn into highly mobile and destructive glowing avalanches of disintegrating hot lava rock fragments, gasses released from these and ambient air (so-called pyroclastic density currents / flows).
PVMBG reports that the avalanches have become near-continuous this evening. The longest pyroclastic flow reached 3500 m length (yesterday afternoon 15:46 local time) , i.e. well into the area of (evacuated and already destroyed) former villages and farmland, which unfortunately has been still in use, partially, resulting in repeated victims during similar events in the past months.
Courtesy of volcanodiscovery.com
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