The X channel was on the rail and the Z had 20000 or something.  So, I rezero'd again this morning.  Currently showing 12000, 1000, & -10000.  So a little better.  I would think these should ultimately be moving around zero unless suffering from large temperature cycling.  I'd think it would be pretty steady in the LVEA under the igloo.

Ideally, we'd look at the U V W signals but those aren't available that I've found for the ground seismometer.  They are accessible on the chassis front panel, maybe I can look at them.

Attached is two days trend showing me disturbing the machine yesterday, subsequent zeroing, followed by about 12 hours of drift on X & Z and again this morning's zeroing.  Interesting the Y axes don't really show any dramatic drift that X & Z exhibit.