Darn, just as I'm getting ready to go to the Land of Big Tectonics. I've closed comments on everything, since I can't police them for terrorist codes.
Oh yeah, OK M4.3 strike slip. It shook out a whole bunch of little earthquakes.
ps. They finally came up with a fault plane solution, so it is longitudinal splitting caused by compression at the ends. The whole thing is becoming a single shear.
ps2. I'm just about to leave. OK looks steady right now, perhaps that was just another leftover. Pictures of active volcanoes coming soon.