What is a safe distance from a power line?
In general, if you can hear a power line you are definitely at around 50 to 100 milligauss, way too much. A few hundred feet away is the easy answer. However, magnetic fields move at the speed of light, and they can cancel or add up. I have been hundreds of feet away from very small looking lines while measuring fields of 10 and 20 milligauss! I have also been just a few feet away from some pretty awesome looking power lines and have measured 0 milligauss. Because of that, one should get a Gauss meter and take readings.
