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Environmental seismic disturbances limit the sensitivity of LIGOgravitational wave detectors. Trains near the LIGO Livingston detector producelow frequency (0.5-10 Hz) ground noise that couples into the gravitational wavesensitive frequency band (10-100 Hz) through light reflected in mirrors andother surfaces. We investigate the effect of trains during the Advanced LIGOthird observing run, and propose a method to search for narrow band seismicfrequencies responsible for contributing to increases in scattered light.Through the use of the linear regression tool Lasso (least absolute shrinkageand selection operator) and glitch correlations, we identify the most commonseismic frequencies that correlate with increases in detector noise as 0.6-0.8Hz, 1.7-1.9 Hz, 1.8-2.0 Hz, and 2.3-2.5 Hz in the LIGO Livingston cornerstation.

Noise in the LIGO Livingston Gravitational Wave Observatory due to Trains