IIRC, if it *is* duchinsense I am thinking of, he also looks at propagation of earthquake waves across the globe taking into account the 3-D shape of the planet.
Also — one must look at where plates impinge on one another, as well as being mindful of the depth at which earthquakes occur. IIRC most fracking is far to shallow to be causing earthquakes directly; one would have to know a lot more geophysics than I to know if the pumping in of the replacement salt water and the subsequent interactions of that water with subsurface rock (including, say, flow, in areas which oil it too viscous to penetrate), would do anything to affect things...
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Sounds like the same guy. He covers a lot of stuff that I only half understand. And he does cover the globe and uses 3d, and plate boundaries etc. etc.
Path of least resistance I understand(fracking related). Grand Solar Minimum means more seismic activity—why—I don't know why, and likely wouldn't understand the explanation.