Reports until 14:40, Thursday 09 October 2025
H1 SEI (OpsInfo)
thomas.shaffer@LIGO.ORG - posted 14:40, Thursday 09 October 2025 (87395)
Earthquake response

I updated Jim's "rasta plot" with a line for when Jim thinks we should turn on the high ASC to help us ride through earthquakes. This is a guess and will need more tested times, so we will very likely make changes to this in the near future. Operators, please transition to the high ASC before the earthquake arrives. You can transition back when the earthquake has sufficiently calmed down, perhaps even waiting until the SEI_ENV node goes out of Earthquake mode. 

Interestingly, the M6.0 from Russia this morning would have been in the high ASC realm, but we looked to have scraped by and survived. 

I'm ready to test the Guardian version of this high ASC switch whenever we get the chance. We had a lock loss just before trying it today, so perhaps Monday or opportunistically over the weekend. In the mean time operators will have to do the switching manually.

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