Lockloss page
No warning or notice of an Earthquake was given it was a sudden small spike in ground motion.
It was Observed in Picket fence.
USGS didn't post this right away, but it was a M 4.2 - 210 km W of Bandon, Oregon right off the coast.
I took ISC_lock to Initial Alignment after a lockloss at check miche fringes.
Relocking now.
Interesting.