Carl le Strange says:

September 20, 2012 at 11:10


I hope that this is a ghost. Otherwise it could be bad news.
Thursday 20.09.2012 09:28:00 65.921 -17.029 1.1 km 3.4 48.86 6.2 km NNW of Þeistareykir

This swarm was different, it started with a rapidly growing tremor episode at Flatöy SIL station. As the swarm started it clipped as the signal got to strong when combining quakes and tremor. What this is a sign of I do not wish to speculate about.
[link to hraun.vedur.is]

Also eleveted levels of tremor, not much though, at Theystareykjarbunga SILs. Also this started before the swarm.
[link to hraun.vedur.is]
[link to volcanocafe.wordpress.com]