“a rare Appalachian Fault”
Interesting. The Appalachians did have to come from somewhere. The Blue Ridge, too.
I remember being on Ft. Lewis and unable to distinguish between the sounds of night div arty (when I was in bed) and earthquakes. Always had to straighten the pix on the walls.
Some of the two of them were memorable. There were always sounds as well as the ‘shake, rattle and roll.’
subduction leads to orogeny.