Here is the update for the new years activity in Iceland. During the new year there was a ML3.0 earthquake in Bárðarbunga volcano system (local name is Kistufell). Where location of the earthquake swarm took place is known for a high level of earthquake activity in the past. So a earthquake swarm in that area is not a surprise and doesn’t mean anything special.
There has not been any more news on the rumble or the explosions in Eyjafjallajökull volcano since yesterday. It might well be that the event that was creating this noise is over. But I am far from sure on that due to lack of information. Due to cloud cover I am unable to see what is going at the top of the Eyjafjallajökull volcano with a web camera. What ever was going on in Eyjafjallajökull volcano it is clear that it was a powerful blast. One idea that I have had that this where a gas explosions of some type. But yesterday there where no reports of ash clouds or anything like that in the news. The weather forecast for the Eyjafjallajökull volcano area is not good for the next day or two. But currently the wind forecast is for a storm in the area of Eyjafjallajökull volcano and other mountains in south-east of Iceland.