Several trends were interesting. A new trend south of CA from Ensenada to the Sea of Cortez runs parallel to past trends but further south.
A large arc seems to be forming now in the US NW.
But the trend that sparked my interest was from Maine through the Great Lakes towards the New Madrid vicinity. Interesting connection between past waterway patterns. I hadn;t previously though they may have been related seismically.
Following the waterways...I wonder if or how the nation would be split: Northern and Southern USA; or Eastern and Western USA? We could have new borders to worry about.