Today we shook HEPIs, all chambers, and shook the input and output arm beam tubes at the corner station. A few of the lines in DARM were excited by the BS injections. We left low frequency lines In the  cal line of ETMX L1 (0.3 Hz lenght) and ITMX L1 (0.2 Hz yaw) to produce side bands on certain lines. These lines are considerably smaller than the microseismic peak, so we didnt want them to keep us from going to observation mode.