"certain houses". I presume this is a laptop and you're visiting friends/family etc?
No, these are homes I've lived in (I tend to move house a lot). It's not a laptop, it's my PC - plugged into the mains.
Do they have any A/C running or anything like that? Were you near any generators or transformers by chance?
Definitely no A/C here in England, it's freezing!
I always situate my office and computer well away from any appliances or anything high-powered. Unfortunately though I can't control what's going on with the wiring behind the wall, and just seem to find that some houses make my computer more "magnetic".
For one thing, can you define what you mean by strong fields at some houses compared to the weak or no fields at others?
Yes…
"No fields"
By this I mean my gaussmeter reads nothing, so maybe less than 0.1 MG (10 nanotesla).
"Strong fields"
By this I'm talking about readings sometimes higher than 4 MG / 0.4 µT. This exceeds regular exposure recommendations by the governments of France, Netherlands, Denmark, Norway, Italy, and Israel.
Also remember that the Earth's magnetic field isn't a static, standard average at all locations on the planet. Things like presence of metals in the bedrock, fault lines, past volcanic activity, etc., all play a part in its strength at that location.
That is fascinating, thanks!
Some houses have dead zones. I live in a mostly wood frame house and dont see much interference. However, other things can cause problems like metal tubular framing and metal roofs. Then some buildings have thick Cement or concrete poured walls, floors and foundations with reinforced Metal Rods.
That's really helpful information, thanks.
Really it seems like the magnetic fields around a computer are a bit of a "lottery" then. I just wish there was some way to shield the computer from it.
I have seen some videos that some people are actually using construction techniques to block wireless signals and 5G wireless from cell towers. They might use things like a metal lattice in the roof structure and expansive paint designed to block electrical signals. I can see a future where we have things like Drywall and siding and windows designed to block wireless signals.
Yes, that's the way I am going myself. I don't have a cellphone, don't use wireless technology, and don't want all these masts flooding my home with radio waves. The evidence for RF radiation being harmful to human health is now overwhelming, and growing all the time. Meanwhile, more and more masts and Wi-Fi routers are being installed!