Interestingly I can tell you almost exactly the propagation of this quake. I was on a zoom call with 2 others at the time, and we were about 10, 25, and 40 miles away from the epicenter.

It was confusing at first, but from when I noticed it to when the guy 15 miles (actually more like 13) away noticed it was about 4-5 seconds. So maybe 3-ish miles per second? Was pretty cool to experience that in real time :)

Also, “paid off yesterday” may be a bit of a misnomer. It certainly was a great test, but the quake itself was really mild, if longer than normal for a 5.1. I can’t imagine there were any injuries. Probably a lot of people diving under desks and then sheepishly saying… “was that it?” (But hey, you won’t know how big it is until it hits, so dive away!)