The Sedona Vortex?? And maybe the iron content of the soils and rock is a factor? I know that there are minerals such as quartz that are used to clock electrical clocks and circuits. (pizoelectric effect.) Avoiding that rabbit hole. Thats another thread.
I think you are onto something there. The piezoelectric effect with quartz would definitely be a good primary candidate. And the iron thing would be confusing, because there is more iron and metals in igneous areas than sedimentary. This is what confused me in the first place.
The only rabbit hole with Sedona would be the hippy version, and the scientific version of there being a geomagnetic vortex hotspot there.
The second is real, the first is Shrooms... lol :)