Have heard noises from within the Control Room.  Not sure what they can be.  We have piles of snow on the roof.  I have gone out after most of the noises to see if a pile of snow or ice has fallen, but have not found anything obvious.  As noted below, some of these bumps corresponded with a glitch seen on H1's DARM.  Here are some of the times I noticed hearing these bumps in the night:

• 2:10:25
• 4:34:12
• 5:32:50(saw glitch on DARM, but this was not as loud)
• 5:38:59 (direction over MSR east)
• 5:44:50 (direction of MSR west)
• 5:58:56
• 6:09:14 (west of Control Room & glitch on DARM, Range dropped to 48Mpc from 65Mpc)
• 6:10:05 (outside door?)
• 6:10:54 (west of MSR, not loud)
• 7:50:26 (outside Control Room, southern wall)