Ghost Hunting Technology - Did You Find Any Natural Explanations?

There was a history to the house that might potentially be involved in some of the experiences that people were having. The only piece of ghost hunting technology, if you want to call it that, that i actually had was an e m f meter. It's typically the magnetic field, the electro magnetic field, given off by technology, not by natural sources. Nothing in the household, nothing in the garage that could have done anything here.