During the night of 6-January-2014 an earthquake swarm started in Langjökull volcano, the northern one. The nearby area is known as Hveravellir geothermal area. So far this has just been a minor earthquake swarm. With largest earthquakes not exceeding magnitude 2,0 at the moment.
The earthquake swarm in Hveravellir geothermal area. Copyright of this image belongs to Icelandic Meteorological Office.
The tremor plot of nearby SIL station shows that more earthquake activity is taking place then appears on Icelandic Meteorological Office website. This are then earthquake that are too small to be detected by other nearby SIL stations.
The earthquake activity at Hveravellir SIL station. Copyright of this image belongs to Icelandic Meteorological Office.
I do expect this earthquake activity to continue for some time now. It is impossible to know for sure if this activity is going to increase or not.