Pre April 18

• Camera offsets made : 77139 : April 12
• Unknown issues began with FC IR unlocking : 77164 : April 14
  • Solved : high winds : April 16
• Wind induced lockloss : 77192 : April 15
  • Audible creak in Control Room
  • 5.9 EQ in S. Korea inbound
• Windy making lock difficult : 77188 : April 16
• Squeezing having lock issues 77219 : April 16
• Lockloss - IX saturation : 77224 : April 16 16:41
• Lockloss - reason unknown : 77233 : April 16
• Nominal SQZ angle changes lock-to-lock : 77238 : April 17
• Feedforward and squeezing problem solving

April 18

• Lockloss, unkown cause, Apr 18 01:02 UTC : 77275
• USGS reports 4.3 in Gulf of Cal Apr 18 04:22:45 UTC
• Lockloss, Apr 18 04:46
• USGS reports 5.1 off CDN coast Apr 18, 06:06:04 UTC
• Lockloss from EQ @ Apr 18 06:11UTC : 77259
• USGS reports 4.3 off CDN coast Apr 18, 06:41:45 UTC
• USGS reports 5.2 in Gulf of Cal Apr 18 07:39:39 UTC
• Still aligning : EQ 5.3 from Mexico April 18, 2024 07:39:45UTC : 77261
• USGS reports 4.1 off CDN coast Apr 18, 08:40:12
• USGS reports 3.5 off west coast of Cal Apr 18, 09:33
• USGS reports 4.2 in Gulf of Cal Apr 18, 11:14:04
• USGS reports 2.7 in N Cal Apr 18, 11:28
• USGS reports 2.6 in N Cal Apr 18, 13:21
• USGS reports 5.6 in Gulf of Cal Apr 18, 15:12:30
• USGS reports 3.6 in W Wyom Apr 18, 15:15
• USGS reports 4.3 in S Cal Apr 18, 19:19

Post April 18

• Locked and observing for 36 min : 77280
• Locked for >8.5 hrs : 77281 : April 19, 08:02
• Back to FF and SQZ troubleshooting
• Lockloss, errant gain change at 21:56 : 77283
• Locked for ~4 hours at Apr 19 20:02
• USGS reports 2.9 N of Badger Mt Community Park : Apr 20 04:18:57
  • Stayed locked : 77299 : Apr 20, 00:00
• Lockloss Apr 2024, 15:23 : 77301
• Lockloss at Apr 20, 22:25
• 2 relocks : Apr 21 23:58 (windy)
• Lockloss 26 min after mid-shift entry : 77318
  • Claim - 5.4 EQ from Mexico at 13:43 cause lockloss
  • USGS reports a 5.4 EQ from 19:05 or a 4.4 EQ at 07:28
  • I am probably getting time zones mixed up

• Locked and observing for 36 min : 77280
• Locked for >8.5 hrs : 77281 : April 19, 08:02
• Back to FF and SQZ troubleshooting
• Lockloss, errant gain change at 21:56 : 77283
• Locked for ~4 hours at Apr 19 20:02
• USGS reports 2.9 N of Badger Mt Community Park : Apr 20 04:18:57
  • Stayed locked : 77299 : Apr 20, 00:00
• Lockloss Apr 20, 15:23 : 77301
• Lockloss at Apr 20, 22:25
• 2 relocks : Apr 21 23:58 (windy)
• Lockloss 26 min after mid-shift entry : 77318
  • Claim - 5.4 EQ from Mexico or wind at 13:43 cause lockloss
  • USGS reports a 5.4 EQ from 19:05 or a 4.4 EQ at 07:28
  • I am probably getting time zones mixed up, but these times conflict