B�rdarbunga Volcano (Iceland): Earthquake Swarm, possible subglacial eruption �

**BabaRa** · 18th August 2014, 19:13

This deserves watching. Hopefully it will settledown.

An intense earthquake swarm started yesterday under B�r�arbunga volcano, located under the northwestern part of the Vatnaj�kull ice cap. It is continuing at the moment and accompanied by elevated harmonic tremor. This might indicate a sub-glacial eruption at the volcano, but this needs yet to be confirmed. The last eruption of B�r�arbunga volcano was in 1797.

http://www.volcanodiscovery.com/bard...-eruption.html

**Spiral** · 19th August 2014, 16:30

Magma Rise at B�r�arbunga/ Update

Source: https://www.youtube.com/watch?v=NrhiB3mV1MU

**BabaRa** · 24th August 2014, 21:26

Seems to be cranking up. 3 fair size earthquakes today, the last being 4.9, although some seismic center are reporting 5.3.

Source: https://www.youtube.com/watch?v=U86e0QQBw6E

**BabaRa** · 9th September 2014, 20:30

Activity continues

Sept. 8, 2014

In a recent article, I covered how B�r�arbunga's caldera has dropped down over 15 meters since this event began 2 1/2 weeks ago, an average of 60 centimeters per day. This collapse not only represents an elevated risk of eruption, but also makes any potential eruption more dangerous by providing an area for a quarter cubic kilometer of water to pool under the glacier.

Well, the collapse is apparently still ongoing. Today's fight measured an additional 2.8 meters of subsidence in the calera since Saturday (from 15.8 meters to 18.5 meters), or an average of around 90 centimeters per day.

The obvious question - does this mean that it's going to erupt - unfortunately gets the same answer as last time when the collapse was first discovered: We don't know. A caldera can collapse without an eruption. A collapse can also trigger an eruption, driving out out magma at tremendous rates and to huge heights. A collapse can be in slow steady increments. It can also drop hundreds of meters at once. Regardless of the possibilities, seeing this kind of activity in a caldera is not a good thing.

Especially not a caldera this big:

More here: http://www.dailykos.com/story/2014/0...?detail=email#