I’m sorry for this late update. I went on to do other things, they took longer then I expected.
The eruption in Bárðarbunga volcano continues as before. Due to the holiday season and bad weather it has been difficult to monitor the eruption in exact details. What I do know is that the lava field is now close or larger than 83 km² in size. The earthquake activity remains, there are however fewer earthquakes taking place now than week ago and that is not all down to bad weather or off-line SIL stations. The drop in earthquake activity appears to be real. If it is going to increase again remains to be seen.
GPS data suggest that no change has taken place and there is ongoing drift in the crust next to Bárðarbunga volcano. Ice on the GPS antenna has been a big problem in last few days and that might not change while winter lasts in Iceland (depending on weather). The eruption is ongoing, there are however larger fluctuation taking place (that is what appears to be happening), sometimes the eruption appears to drop so much that it is not visible, just before it increases again. This would in line what was reported in November, the question is that change increasing or not. At the moment I am not sure on this detail, but I am waiting reports on this to be published (that might take a while).
I don’t think there are any more news on Bárðarbunga volcano at the moment. Next update is going to be on 2-January-2015.