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???