At 02:31 PST this morning we had a slight vacuum glitch at EX originating at X2-8 (beam tube 220m from EX). Gas levels were low, well below VACSTAT trip levels. Pump down time was about 6 minutes. Attached plot show a coincident drop in H1 range at this time.

Second plot shows a similar correlation for an EX glitch on Sat 11 Jan 05:45 PST.