Totally, I investigated three locked loss during last night.
1. 1443273610 13:19:52 UTC
Fig.1. 7.5 Hz oscillation detected in ETMY TM oplev, but no change in MN TILT SUM, so not the usual oplev glitch, but actually sudden excitation of the 7.5 Hz.
Between 1 - 2, large earthquake detected and we need longer time for IFO recovery
2. 1443301314 21:01:36 UTC
No critical hint can be detected, no significant ground motion etc
3. 1443303898 21:44:40 UTC
Fig.2. I am not so sure the PMC related channel, something happened in PMC. We need to ask Yuzurihara-san or expert of the PMC to check the PMC related signal more.
