edmond.merilh@LIGO.ORG - posted 11:21, Thursday 24 November 2016 - last comment - 12:10, Thursday 24 November 2016(31817)
Large EQ near El Salvador
≈19:02UTC the wave arrived. All arm ISIs tripped at 19:07.
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During large earthquakes operators should try changing the SEI_CONF state to LARGE_EQ_NOBRSXY before any ISI's trip. This should make the ISI's more resistant to tripping, hopefully reducing the amount of realigning you have to do when you try to start locking. Once the .03-.1 hz motion has come back down to 1 micron or less you should try one of the other earthquake states. When the .03-.1 hz motion is back down to around .2-.5 microns, you should be okay to switch to Windy (or whatever state is appropriate for the conditions).