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The Calm before the Storm

Water drainage basins at the glacier bed for the principal rivers draining Vatnajökull. Subglacial water-filled cupolas, located under depressions in the glacier surface, collect meltwater and periodically drain by means of jökulhlaups. In order to determine water divide locations on a regional scale, a model was employed which assumed that water pressure at the glacier…

Image by Tom. Upper part shows a closed propagating dyke. The lower shows a rift open down to the mantle. The upper version draws its magma from a central volcano, the lower from the mantle. Upper alternative would give a smaller eruption than the lower.

Bárðarbunga reader question

Richie, one of our readers emailed in a good question that is a good starting point for a brief update on Bárðarbunga. “Could you do an article comparing this intrusion to others? Looking at the post it appears that it is almost 40 Km long but how wide is it and in terms of volume.…

ritish-Airways-Flight-9 turbine and compressor blades (Image by NOVA13, Wikipedia, CC-BY-SA 3.0)

A few notes on possible flight disruption

[caveat: this is my opinion and in no way should be used for any decision-making] Given the level of disruption caused by the 2010 eruption of Eyjafjallajökull there has been an inevitable level of concern from many readers/commenters on the likelihood of future air travel plans being affected by any eruption in Bardarbunga. Unfortunately we…