Here are the observed H1-L1 coherences as of October 12, 2015, as calculated by stochmon:
https://ldas-jobs.ligo.caltech.edu/~thomas.callister/stochmonO1/stochmon.html
Some plots attached.
100 mHz resolution. 1E-5 is the expected level of coherence due to uncorrelated noise.
Frequency, coherence
33.6 Hz, 1E-3
34.6 Hz, 2E-2
35.4 Hz, 1E-3
42.5 Hz, 6E-4 (barely above background, could be a noise fluctuation)
64.0 Hz, 2E-4 (barely above background, could be a noise fluctuation)
74.0 Hz, 5E-4 (barely above background, could be a noise fluctuation)
128.0 Hz, 1E-2
256.0 Hz, 2E-3
331.8 Hz, 3E-4 (barely above background, could be a noise fluctuation)
351.1 Hz, 4E-4 (barely above background, could be a noise fluctuation)
559.9 Hz, 2E-4 (barely above background, could be a noise fluctuation)
736.0 Hz, 3E-3 (23rd harmonic of 32 Hz)
1904.0 Hz, 2E-3 (119th harmonic of 16 Hz)
2160.0 Hz, 4E-4 (135th harmonnic of 16 Hz)
2376.0 Hz, 4E-3 (297th harmonic of 8 Hz)
2768.0 Hz, 7E-3 (173rd harmonic of 16 Hz)
2984.0 Hz, 7E-4 (373rd harmonic of 8 Hz)
3001.2 Hz, 1E-1 (calibration lines)
4928.0 Hz, 3E-3 (77th harmonic of 64 Hz)
5016.0 Hz, 3E-3 (627th harmonic of 8 Hz)
5144.0 Hz, 2E-1 (largest coherence, 643rd harmonic of 8 Hz)
5616.0 Hz, 2E-3 (351st harmonic of 16 Hz)
5624.1 Hz, 6E-3
0.25 Hz, 4E-6 is the expected level of coherence due to uncorrelated noise.
Frequency, coherence
34.25 to 35.25 Hz, 1E-3
36 to 37 Hz, 1.5E-3
37.25 Hz, 2E-3
42.5 Hz, 2E-4
128.0 Hz, 3E-3
256 Hz, 6E-4
1904.0 Hz, 4E-4 (119th harmonic of 16 Hz)
3552.25 Hz, 2E-4
4163.75 Hz, 5E-3 Hz
4576.0 Hz, 2E-4 (143rd harmonic of 32 Hz)
5016.0 Hz, 7E-4 (627th harmonic of 8 Hz)
5144.0 Hz, 1E-1 (largest coherence, 643rd harmonic of 8 Hz)
5584.5 Hz, 2E-2
5655.5 Hz, 1E-3