What about pre-recent earthquakes?
Correlation based on geology of predisposition of both gas content and tectonic activity?
I think it’s the timing that’s the key...did the earthquakes pre-date the drilling?
With that kind of logic you will never be allowed into the Green Church. ;>) They do have a list of all historical earthquakes, but I am not sure it includes the smaller ones. I will take a look at it today. It would be fun to make an animated Gif of a time lapse of earthquakes in the area.
One thing I find interesting about the maps I posted is the scale of the area with recent activity versus the location of injection wells. I find it hard to believe that those two wells could have been responsible for such a large region of seismic activity.