I additionaly checked ETMX IM damping channel and they are affected by PCal lines.

More information is available here.

https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11426

Following link is list of channels which is affected by DARM DoF. It maybe better to avoid to use these channel in noise source study.

https://github.com/gw-detchar/tools/blob/master/GlitchPlot/Script/DARMaffected.dat