Today (9-May-2014) at 23:15 UTC a strong earthquake took place in SISZ. Exact magnitude is not clear at this moment, but the magnitude of 4,0 is wrong in my view based on how this earthquake appeared on my geophone. This earthquake was felt in south Iceland and in the capital area. I am going to post updates on this earthquake once I have the details.
The earthquake can be seen here along with all the aftershocks that are going to take place.