I think there was a large EQ, maybe a 7, in that general area-was that the Petrolia EQ? I think it was a thrust event-it uplifted a section of the coast. Its interesting that the current swarm is strung out along 20 km. If the locations are accurate, then one should consider the following: a M4 EQ ruptures an area much smaller than 1 km across (I'm pretty sure-as usual I'm not checking). So, either the earthquakes are triggering other ones, some external effect is triggering all of them, or the fault is creeping....(or probably other possibilities). Chris