Reports until 10:22, Wednesday 04 March 2026
H1 CDS
david.barker@LIGO.ORG - posted 10:22, Wednesday 04 March 2026 - last comment - 11:11, Wednesday 04 March 2026(89355)
SWWD bypass BSC1 (ITMY) seismic, suspension shaking because of earthquake

Ongoing earthquake is shaking ITMY to a point where its SWWD was going to DACKILL seib1, I've bypassed both SEI and SUS for now.

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david.barker@LIGO.ORG - 10:32, Wednesday 04 March 2026 (89356)

Note that ITMY is the only SWWD which is ringing up.

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jim.warner@LIGO.ORG - 11:11, Wednesday 04 March 2026 (89357)SEI

Not sure what was happening here, but it was not just the earthquake ringing up the sus. HWWD killed the ISI coildrivers, the sus continued to shake bad enough it was saturating all of the ISI seismometers for several minutes. I had to turn on off the sus damping, let the quad calm down, go reset the HWWD and ISI coil drivers before the ISI stopped shaking. When I went to the CER, I found all of the ISI coil drivers powered off. I reset the HWWD on the sus rack, then power cycled the ISI coil drivers to get them back on. Quad and ISI have both calmed down, damping is back on, Corey is slowly bringing the ISI back up. Unclear if there was cable pulling in the area that caused this, coincident with the earthquake.