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Sinabung volcano
Stratovolcano 2460 m (8,071 ft)
Sumatra, Indonesia, 3.17°N / 98.39°E
Current status: restless (2 out of 5)
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Sinabung volcano eruptions:
2013-ongoing, 2010
Typical eruption style:
Explosive
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Sinabung volcano (Sumatra): eruption news and activity updates

Sinabung volcano (Sumatra) - eruption increases again, large pyroclastic flows

Tuesday Jan 14, 2014 08:48 AM | BY: T

The probably largest-so-far pyroclastic flow at Sinabung this morning
The probably largest-so-far pyroclastic flow at Sinabung this morning
After a few days of deceiving calm, the eruption of the volcano intensified again today and produced the so-far largest pyroclastic flows, reaching probably more than 5-6 km in length, and associated ash plumes that rose to approx. 25,000 ft (8 km) altitude:

It seems that the previous dome which grew at the summit of Sinabung, collapsed a few days ago, leaving a large crater breached on the side where the earlier pyroclastic flows had gone down. The temporary absence of a lava dome in the past days led to the cessation of pyroclastic flows. Now, the new dome has again surpassed the boundary of the breach and sheds pyroclastic flows into the deep ravine below. (Thanks to B. Behncke for the comment)
On the other hand, a strong increase in SO2 emissions and hybrid earthquakes indicate that a larger new batch of new magma has risen, which also explains the new more vigorous activity.
Previous news
Monday, Jan 13, 2014
The number of refugees to this day is as much as 25,810, from a total of 8,040 households, in 38 refugee camps. The lava dome seems to have decreased its activity, as no more significant pyroclastic flows occurred over the past 1-2 days. However, seismic activity remains high and it is too early to predict a near end of the eruption. It could even be a precursor to more violent explosive activity if the apparent calm at the moment is simply due to the fact that the degassing / effusion process in the past weeks has become inhibited by a plug of more viscous lava under which pressure is building up. ... [more]
Sunday, Jan 12, 2014
Activity at the volcano remains unchanged. Eruptions with frequent small to medium-sized pyroclastic flows (up to 4-5 km length) continue and more than 25,000 people are reported evacuated. Problems caused by the extensive damage to crops and structures, health and infrastructure problems caused by the ongoing crisis with ash everywhere are increasing. ... [more]
Pyroclastic flow at Sinabung this morning
Saturday, Jan 11, 2014
The volcano continues to be very active with viscous lava extruded at the new dome, which frequently collapses to form hot avalanches (pyroclastic flows) that generate ash plumes rising up to a few km. ... [more]
4.5 km long pyroclastic flow from Sinabung this morning
Friday, Jan 10, 2014
Activity of the volcano has remained similar to the previous days. The actively growing lava dome, being a mass of unstable, moderately viscous lava, frequently collapses in parts and produces hot bloack and ash avalanches (pyroclastic flows) that reached up to 4.5 km distance. According to the latest figures, the number of refugees from the 5-7 km exclusion zone has reached approx. 25,000. [more]
Pyroclastic flow at Sinabung this morning
Wednesday, Jan 08, 2014
The volcano's eruption remains essentially stable. The volcano continues to produce frequent pyroclastic flows - avalanches of lava rocks and ash mixed with gas and air, triggered by partial collapses of the growing lava dome. They continue to reach 2-4 km lengths and run down the SE slope where an extensive delta of pyroclastic deposits is formed. ... [more]

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