My wife woke up several nights by a metallic "thunk". It happened to be while I was talking on 10 meters and turned out to be the ground fault circuit interrupter (GFCI) on her hair dryer cord. Apart from the obvious answer of leaving it unplugged, I'm looking for a solution to preventing this because I'm concerned there are other effects of which I'm not aware.
At the time, I had not completed the grounding of my newly set up shack. I've since established an earth ground using a backup water well point pipe in my basement (it's electrically isolated from the pump by a PVC connect pipe and is hardly used so I'm not worried about regular interference from that). Unfortunately, the 12v supply for the HF radio doesn't seem to have a ground stud on it so I can't ground that apart from the regular mains cord ground. The antenna mast is grounded to a typical 8ft ground rod using a 6AWG wire. But despite my efforts at proper grounding, the problem still occurs.
Is the GFCI tripping due to improper grounding or possibly due to RFI (which additional or better grounding wouldn't necessarily fix)? And how could this tripping be prevented? I'm concerned that whatever is causing this could be affecting other more sensitive (and expensive) devices in the house.
(Note that this is an older house - 1960s - and doesn't have any GFCI breakers or outlets where I'd expect there to be any such as the outside, garage or kitchen. So I can't report on similar behavior in other GFCIs.)