September 4, 2012 at 01:04
EQ swarm is ongoing in Bláfjöll, Iceland. This is about 19 km away from where I sit and write these words – in Reykjavík, to the left up on this IMO chart, about 315 degrees from swarm end – 19 km to the North-West for those do not know how to read the compass.
[link to www.vedur.is
Some EQ tonight are felt as very tiny or small taps under the floor, but one must be very quiet-still to observe them. This swarm strikes me as UNUSUAL and has not happened since I started watching the EQ charts. It SEEMS tetonic in origin, likely is, but “steadyness” and certain “concentration” make me think of what makes it really tick now. SAN SIL is closest to Bláfjöll, only afew Km way. [link to hraun.vedur.is
The swarm to the west (Fagradalsfjall) dried up but Bláfjöll stated shaking even more tonight.
The mountains (Bláfjöll) are part of Brennisteinsfjöll Volcano and “relatively large” lava eruption was there (crater due east 2-3 km) about 5-6,000 years ago, and a smaller one 1012 years ago (year 1000 AD). These were of fissure type, quickly forming few active craters from which lava floated for a while. One lava stream (about 6,000 years ago) entered Reykjavík area, at Elliðaárdalur, and if same happened today whould be a nuisance and cause traffic delays for some days, in certain directions (I wrote lengthy remark on this some time back, but likely all have forgotten this now). I went to Bláfjöll yesterday and indeed some minour shaking was found.
[link to volcanocafe.wordpress.com