Had the IFO at Engage_ACS while Kiwamu was running some OMC checks. The IFO lost lock, which appears to correspond to a sudden wind gust of ~25MPH. The lockloss plot posted shows this gust.
We did some further investigation using the lockloss tool (alog #: 20337) on this event. The first 48 channels that went wrong before the lock loss were plotted, and a complete list of all misbehaving DQ channels were listed in text file, ordered by time before lockloss. It seemed that we saw a violent ground motion, and lots of coil drievers were trying hard to react on it before they finallyt failed.
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There was a mistake while I filtering the data into different frequency bands, so the plots I posted yesterday did not really make lots of sense. The error has been fixed and new plots attached.
