: The intrusion would have temporarily elevated the strain rate and
caused the otherwise ductile lower crust to behave in a brittle manner. Source mechanisms
for the earthquake data
set are rather scattered but commonly show horizontal, E-W
oriented dilation, particularly at the crust-mantle boundary, further supporting the idea of
magma intruding into the crust. During the summer of 2009 the fourth swarm
/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_013.pdf