I’ve always wondered if high energy disturbances might cause weak spots in the continuum. Stuff like nuclear blasts and testing. Maybe the random nature of the activity, flaps and so called portals are due to spots where there’s dimensional scarring or weakening, flux in the earth’s magnetic field, when there’s spikes of solar activity, etc.
The area in the article is where they used to mine for gold - and gold is found where there are lots of quartz deposits. The electromagnetic spectrum is thus in flux?