DIAG_MAIN was reporting that IM2 P and Y were out of normal range, and after trending them I saw that they were WAY out of range (Normal for H1:SUS_IM2_M1_DAMP_P_INMON is 603 and -205 for Y). The values now are at P = 0 and Y=-19. The trend shows a sudden move at around 11:15UTC (4:15PST), when no one was here and the IFO was unlocked. The most recent lockloss before that was at 8:03UTC. The suspension has been aligned with no trips since the 18th, and HAM2 has been Isolated since the 19th, no trips.

The other IM's also seem to show signs of movenment then, but nothing as extreme as IM2. 1&3 seemed to get noisy after 11:15. (see attachment)

What could have caused this move?