Re: Curious how they eliminate one potential source of error
Yes, I understand that they did a lot of work to reduce and nearly eliminate local sources of vibration in what must be one of the most sensitive vibration detectors on earth. But the fact that they spent so much time and effort working on it shows that it's not easy, and there's no single clean solution to it. The argument that vibration transmitted through the earth from a site equidistant from both detectors wouldn't be strong enough to travel that far without being detected by other sensors is plausible, but I'd like to see data supporting that. However, I've just finished reading the paper and I see that in section IV they wrote specifically about this topic and state that the environmental sensors should be sensitive enough to detect any vibration in the same magnitude range as their gravity wave signal, and in fact the level of noise detected by the environmental sensors at that time amounted to no more than 6% of their signal magnitude.