Something is happening at Grímsfjall volcano. The SIL seismomter on Grímsfjall volcano is shows a sharp increase in harmonic tremors in Grímsfjall volcano. It also appears that earthquake activity in increasing in Grímsfjall volcano.
I do believe (based on the data so far) that a eruption is about to start in Grímsfjall volcano. I am going to post more updates on this when I know more. But please note that I might be wrong. But this is what the data suggests so far.