Thanks for the links, everyone.  But these are DEFINITELY “strong enough to be felt” and are much more frequent this year than previously.  Feels like a major explosion just outside of town with the shock wave hitting us like a freight train, jolting the house with cracking sounds as it rumbles through.  I was in many earthquakes in Alaska, but this is even more frequent and more “felt” than the average ones up there.

Probably nothing to affect our survival unless we get a really big one.  But it is unnerving…6 times in one day???