A scan of coherences can be found at the following link:

https://ldas-jobs.ligo.caltech.edu/~gabriele.vajente/bruco_lho_1165834817/

Here's my summary

• low frequency (<20 Hz) is coherent with CHARD_Y (fig. 1)
• MICH/SRCL/PRCL are low (MICH very low, the other two somewhat higher but still far from the noise spectrum) (fig. 2,3,4)
• not much below 100 Hz
• IMC WFS signals between 100 and 800 Hz, especially at the bumps in th 300-400 Hz region, where the coherence is very high (fig. 5). The same coherence pattern is visible in ISS signals (fig. 6) and IMC REFL (fig. 7)
• Not sure what this is, but there is large coherence with SUS-ETMY_L2_FASTIMON_UL_OUT_DQ and similar signals (fig. 8), broadband between 100 and 1000 Hz and very high above 600 Hz. The coherence seems to be the largest for UL, the smallest for UR and intermediate for the other two coils
• around 1kHz there is coherence with OMC-PI_DCPD_64KHZ_AHF_DQ, but I'm not sure if this is important, since I don't know what that channel is (fig. 9)