That'll shake things up

Seems there was a magnitude 5.2 quake in the Midwest yesterday (not felt in Philly, thus my ignorance until this moment) in the Wabash fault in Southern Illinois.
For a California boy who lived through the last big one there, that's not terribly exciting.
But the Wabash fault may be part of the New Madrid fault zone in the same area.
The New Madrid fault zone produced a series of quakes in 1811 and 1812 that reached an estimated magnitude 7.0, putting them among the strongest known quakes to have occurred east of the Rockies. The quakes changed the course of the Mississippi River and were felt in New England.