Comment Re:An honest question (Score 1) 72
I took a tour of the hanford Ligo site a few years ago..
The staff there said at one point they were trying to figure out a vibration they were detecting on a regular basis..
They finally figured out they were picking up when the spillways were open on McNary dam 60 miles away.
They also pick up trains in the Columbia river gorge and traffic on highway 240 near by.