Quakes Pack More Punch in Eastern Than in Central United States
A new finding rests on the recognition that fault types differ between the two regions. It helps explain prior evidence that human-induced quakes and natural ones behave the same in the nation’s center.
By Kimberly M. S. Cartier 18 August 2017
Earthquakes in the eastern United States and Canada are many times more severe than central U.S. earthquakes of human or natural origin, earthquake scientists have found, highlighting a crucial need to separate the two regions when designing future earthquake hazard maps. The study separated the regions from the Mississippi-Alabama border up to the base of Lake Michigan, approximately 87°W.
https://eos.org/articles/quakes-pack-more-punch-in-eastern-than-in-central-united-states