Since the last post about Sinabung the eruption has continued with ever increasing amounts of pyroclastic flows and nue ardentes. On occation the extended 7 kilometer evacuation zone has been tested in the direction of the gorge that the majority of the flows has followed. There have though been no reports of them extending beyond the 7 km boundary. Also the amount of material in the individual pyroclastic flows have increased. This leads to the conclusion that the amount of extruded lava has increased over time from the initial 3.5 cubic meters per second.
Around midnight CET Sinabung suffered an explosion that was beyond any seen so far. The previous pure explosions have been rather small ranging up to a few kilometers. Todays explosion caused en ash column that according to local sources in excess of 8 kilometers. Remember that this is from eye witness reports that so far is not officially confirmed.
As some of you know the authorities in Indonesia issued a warning 10 days ago that there where seismological signs that a major eruption might be on the way. It seems that we might now be seeing the start of such a thing, or at least a more explosive phase. As I am writing this the webcam location is covered in dust.
We will get back to this as new things unfurl and as we get new data. As soon as we get something we will publish an update.
For background I refer to my main article about Sinabung and the info-page Cryphia has made: