Either 3.6 or 3.97, at 5.05am! I woke up to it, and it was kind of eerie, not because the house was shaking, but because I didn't know why the house was shaking.
(There were a couple possibilities: earthquake or bomb. I have no thoughts on the first, as my area's not prone to or likely to deal with one, but the latter? is a different story altogether.)
ETA: In before
boosette laughing her ass off about us earthquakeless east-coasters.