Seismicity map of NM from 1973 - 2012.
Do you have one for Arizona? That is where the quakes were this evening.
I notice the 4 Corners area is stable, yet with all those gas wells and fracking there you would think it would be a whole lot of shaking going on, that is IF fracking caused earthquakes.
On the other hand, it looks like the Raton area, where there are no gas wells, is all shook up. Maybe it is all those old coal mines collapsing.