“People on Facebook saying they didn’t feel it in northern Idaho. But reports from Oregon and Washington were saying yes.”
Northern Idaho is mostly shallow bedrock. The areas with more shaking would be areas with deeper rock or looser overburden such as the Spokane Valley (river and glacial deposits), etc.
We had a moderate EQ last year and we didn’t feel it, but folks two miles farther away from the EQ but in a river valley it shook pretty good.
My friend is in Caldwell. He said it shook him bad and he’s from Calif