Anyone using LIGO sensor?

Though those early models didn't have the sensitivity necessary to capture a gravitational wave signal, progress continued for several decades and, in 1990, the National Science Foundation approved the assembly of two LIGO detectors; one in Hanford, Washington and another in Livingston, Louisiana.

Construction of both detectors was completed in 1999 and the search for gravitational waves began a few years later. For more than a decade, the detectors continued to come up empty, as physicists learned how to handle the highly sensitive instruments and all the things that could go wrong. Any number of things can mess with the facilities, including something as trivial as ravens pecking on the pipes leading into them.