Yeah this matches what I've been tracking for years. Norfolk is absolutely rife with geomagnetic weirdness and I've noticed the correlation myself - storms seem to crank up whatever baseline activity is already present in a location rather than creating something new from nothing.
My working theory is it's electromagnetic. Thunderstorms dump massive amounts of EM energy into the local environment and if you already have a "active" spot, that energy is basically fuel. Same reason I think ley line intersections see more activity during solar events.
The tricky bit is separating genuine anomalous stuff from the house just creaking and settling under pressure changes. That's where most people go wrong and end up convincing themselves their perfectly normal Victorian terrace is haunted every time a front comes in off the North Sea.
Has anyone actually logged this properly with timestamps and weather data? I'd be genuinely interested to see if the correlation holds across different locations or if it's regional. Something about the geology here might be a factor that doesn't apply everywhere.