Ryan took the IMC offline after a lockloss so that we could measure dark noise.  The attachment shows that there is a change in the location of the lump from 40Hz to 60Hz.  Jeff pointed me to this alog: 68377 where he previously saw this moving around.

Other than that, there is little change in the dark noise, if anythingit is slightly better now than before the OMC swap from 100-300Hz.

This is in the Noise budget repo: /ligo/gitcommon/NoiseBudget/aligoNB/aligoNB/H1/couplings/Reference_noises.xml