Name that Volcano Riddle!

The week has been calm eruptionwise, but fairly frisky earthquakewise in Iceland. The transform faultline north of Siglufjördur kicked into high gear with continous medium sized earthquake swarms. The active faultline is one of two major faults making out two of the boundaries for a microplate that is seismically locked at its southeastern corner under…

Odd strain at Hekla

Hekla have one of her days today. It all started at 08.56 with a small earthquake located at Árnes close to Haukadalur SIL-station. The earthquake was clearly tectonic and at a respectable depth of 6.2km. The earthquake will most likely be revised later as it is of low probability due to low energy released. What makes…

What’s going on at Katla? Part III

Trying to make sense of complex phenomenae In the first two instalments, we had a look at Katla as she appears through media and what she has done historically. It is now time to have a look at what’s going on and try to paint a coherent picture of what she actually is, is up…

What’s going on at Katla?

Part 1, public awareness background The current hysteria over Katla started at the same time as the ash from the Eyjafjallajökull played havoc with European air travel. Some journalist noted that Iceland’s, at least publicly, most respected volcanologist Professor Páll Einarsson, the man who nailed down the February 2000 Hekla eruption to within 30 minutes,…

Hekla – Changes in rapid strain

During the last 48 hours Hekla has suffered an increase in rapid strain movements. On the images below you see two types of motion. The first type that is creating a sinusoidal movement (wave-like) is a phenomenon called earth-tides. They are normal and do not influence even the most agitated volcano. The second type of…