Earthquake.

Yep, at 4:30 or so this morning, I felt the Mogul earthquake, which measured 4.0.

It was a rumble rather than a shake. Nothing moved from side to side. Again, the dogs couldn't have cared less.

Since that initial report, the quake has been revised to 4.2.

What is notable about the quakes isn't their severity; it is the fact there have been so many of them in such a short time.