Rather suggestive incident reported at a link posted in another thread:

Man-Made Earthquakes in Iceland. The quakes here are a side effect, like the ones reported for fracking areas?

Although Skarpi doesn't believe the "man made" quakes are related to the current flurry of "natural" ones there, when the earth moves, it's difficult to predict where it will stop moving.

You can't usually move one piece of ground without shoving another chunk out of the way.

John