When Is a Caldera a Caldera?

It does not take long for a newcomer to volcano-watching, if we are to call our hobby that, to come across the term “caldera”, cauldron. The term is very loosely used to describe large volcanic depressions ranging from volcanic craters a few hundred metres in diameter up to the huge depressions left behind by the…

The Long Wait?

Yesterday, the Bardarbunga crisis celebrated its first month. As our readers have already remarked, the IMO has put out an update that summarises the earthquake data over the past month. In all, some 25,000 earthquakes have been registered by the automated system of which no less than 5,900 have been manually checked by a seismologist.…

Bardarbunga Holuhraun Update 140910

Amidst the truly spectacular images, the “eye candy”, currently reposted on our FaceBook account, on Twitter and on here by our readers, three possible scenarios emerge. Professor Magnús Tumi Guðmundsson, professor of geophysics at the University of Iceland´s Institute of Earth Sciences and the foremost Icelandic expert on subglacial eruptions outlines the three following scenarios:…

Bardarbunga Update 20140903

  Since the appropriate Icelandic authorities have today publicly mentioned the possibility of a large, acidic and explosive eruption at Bardarbunga, we now feel free to inform you that this possibility has been discussed by the Dragons, behind closed doors, for well over a week. The key information comes from this official IMO graphic: The…