ITF found locked at LN3 in SCIENCE mode but under earthqauke (fig1). It unlocked at 21:00 UTC.
Relocked at 00:41 UTC, after the usual cross-alignment in ACQUIRE_DRMI. SCIENCE mode.

DET
As predicted by Gouaty, SDB2_B1_DC_NULL has become noisier and the BNS range has dropped from 55 to 47 Mpc (plot attached). Expert informed.