Posted on Feb 21, 2018
Study: Tectonic plates of continental interiors are less stable than previously thought
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The New Madrid earthquake in Missouri is an example of the instability of the U.S. interior. PO1 Tony Holland
https://en.m.wikipedia.org/wiki/1811–12_New_Madrid_earthquakes
https://en.m.wikipedia.org/wiki/1811–12_New_Madrid_earthquakes
1811–12 New Madrid earthquakes - Wikipedia
The 1811–12 New Madrid earthquakes were an intense intraplate earthquake series beginning with an initial earthquake of moment magnitude 7.5–7.9 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. They remain the most powerful earthquakes to hit the contiguous United States east of the Rocky Mountains in recorded history.[1][2][3] They, as well as the seismic zone of their occurrence, were named for the...
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