Noise Transients in the LIGO Livingston Detector Due to Trains

One of the many types of transient noise observed in the Advanced LIGO gravitational wave detectors is due to light scattered from surfaces with large relative motion. These transients increase the background noise for astrophysical searches and reduces the reach of the detectors. This noise caused by low frequency anthropogenic and microseismic motion can be identified as small duration arches in time-frequency space in the main gravitational wave data channel. Trains near the LIGO Livingston (LLO) Y end station are one of the main causes of increased ground motion in the anthropogenic frequency range. In this presentation we investigate the noise caused by trains. Specifically, we investigate trains that happened during O3 and their corresponding detector glitches. Preliminary results identify 583 trains and 8051 glitches due to these trains in O3. To help find the location of the surfaces that produce the scattering noise, we look for correlations between the glitches and ground motion due to trains in both the LLO Y end station, and in the corner station.