TITLE: 08/08 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: n/a
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 12mph Gusts, 10mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

VACUUM Alarms:

• Verbal Alarm:  "Vacuum pressure high at BSC2" a few times per minute starting at about 6am local time (which looks like it's the PT120B gauge).
  • will lower volume Verbal until it is addressed.
• Alarm Handler: 
  • PT120B is flashing with a MINOR (yellow) alarm (corresponding with the Verbal Alarm above).
  • PT110_MOD1 has had a constant MINOR (yellow) alarm.
• The attached plot of PT120B shows how these alarms correspond with some choppiness (jumps up in pressure) starting around 6am local.

There was also a big earthquake last night that arrived at around 1am local (8utc) (M7.1 near Nichinan, Japan); this took down L1 & V1 for about 5hrs.