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For 30 years geologists have been puzzled by a remarkably straight magnetic line that runs between New York and Alabama along the Appalachians.
If so, it's no surprise that the most dangerous part of the eastern Tennessee seismic zone is right next to part of this magnetic line and has the second-highest earthquake frequency in the eastern United States.
The fact that the fault has not cut through the layers of earth above it and shown itself on the Earth's present surface suggests it's not active and so people can probably rest easy.
Originally posted by UberL33t
This article is over a year old, published in May 2010. I just thought it was worth bumping due to today's current events. Take a look at the path of the fault line they discovered. Interesting!