YuhangZhao - 10:55, Monday 22 March 2021 (2416)
Mirror drifts away a lot after earth quake on 20210320
Earth quake happened on 20210320 18:09, which was quite strong and long.
We checked the oplev signal of all suspended mirrors (attached figure 2). The watchdog of BS and END mirrors were switched off. However, since we didn't give large offset, we can just use the oplev signal to check how much mirror drifted. We could see these change
| Yaw_change | Pitch_change | |
| PR | -100 | +2500 |
| BS | -500 | +1040 |
| Input | -320 | +2450 |
| End | +720 | -4100 |
Images attached to this report
