Rode through a 5.8Mag EQ near Trinidad, OK. Primary microseism peeked at just a little over 1.0um/s. Lost lock at 23:08 due to 6.2Mag EQ near Indonesia. Primary microseism peeked at 7.0um/s. Holding the IFO in down until the microseism improves. Jeff K. switched to LARGE_EQ_NOBRSXY after the Lockloss.