J. Kissel, J. Bartlett

Another impressive show by the SEI / ISC team in which the IFO rode through sustained ~0.5-1 [um/s] BLRMS EQ band (30-100 mHz) motion, during ~75 percentile, ~0.5 [um/s] microseism (100-300 mHz BLRMS), and 5-10 [mph]. 

A good study for future reference of what we can withstand.

The lock loss occurred @ 2016-12-06 23:07:33 UTC after about 1.5 hours of EQ evidence on site as recorded by the BLRMS

This was the survival of several ~6.0 mag EQs in a row,
5.8 [mag] Scarborough, Trinidad and Tobago
6.4 [mag] Reuleuet, Indonesia
4.3 [mag] Scarborough, Trinidad and Tobago

As per Sheila and Jim's recommendation (see LHO aLOG 32086), we've used the SEI_CONF manager node to move platforms to the LARGE_EQ_NOBRSXY state after the IFO unlocked. This moves that HAMs to using no sensor correction ("SC_OFF"), and the BSCs to "BLEND_Quite_250_SC_None." We will restore the configuration to the nominal "WINDY" configuration, once the EQ band falls below 1 [um/s] BLRMS.