I have a friend from High School who was working at CERN, and he and his wife were going to stay in Copenhagen for a day with her parents. She is geologist, and has worked in Iceland, and so the working theory is that she called in some favors in order to spend a full week with her parents.
I've heard that over course of the last two thousand years every time this volcano erupts it is followed within 6 months by the eruption of a nearby and much larger volcano - something to watch for ...