posted on Jan, 20 2010 @ 01:32 PM
The following link has a video from ABC news that shows some of the largest fault lines in the U.S.
One of them is the San Andreas fault line, but there are at least four more active zones, and one of them is very close to New York City which has
been quiet for 200 years and this is a big problem because stress is very probable building in that fault line.
On the morning of December 16, 1811 there was a large quake in the New Madrid fault which runs from Saint Louis to Memphis, it was because of this
earthquake and the aftershocks that followed that Reelfoot lake, which is 16 miles long, was formed during the most powerful series of earthquakes in
the U.S. that we know about.
The first earthquake was estimated to be a 7.5 but it had more than 2,000 aftershocks over 5 months and some aftershocks measured up to 8.0 in the
richter scale. This event was so powerful that the Mississippi river ran backwards.
If the above video doesn't load properly you can also watch it in the following link which also has an article with some info.
[edited to add info and for errors]
[edit on 20-1-2010 by ElectricUniverse]