distance between group centres
DL Dalvík lineament
EVZ Eastern volcanic zone
fps fault plane solution
GL Grímsey lineament
GPS Global Positioning System
HFF Húsavík-Flatey fault
HM Hreppar micro-plate
InSAR Interferometric Synthetic Aperture Radar
J17 the 17 June large Holt earthquake
J21 the 21 June large Hestvatn earthquake
KR Kolbeinsey Ridge
max48 maximum group size of 48 events
NVZ
/media/vedurstofan/utgafa/skyrslur/2010/2010_003rs.pdf