[Skywise]

(04-11-2014, 09:26 PM)Island Chris Wrote: Another, larger quake. The first one was shallow and strike-slip. This one is M6.6 and is thrust.

http://earthquake.usgs.gov/earthquakes/e...si#summary

They are far enough apart and the magnitudes are small enough that the first is not a direct foreshock of the second. But logic says that they are related. But I doubt this is well-understood at all.

My very first thought is the 6.6 subduction was getting close to going anyway. The static stress change from the 6.1 was the proverbial straw.

The problem is we simply have little to no data about what goes on beneath our feet. There's the infamous saying about mankind knowing more about the backside of the Moon than the deep oceans. Well, we know even less about the deep crust.

Brian