How do scientists know the chronology of earthquake events in the MidWest?
This interactive timeline shows that the 1811-12 earthquakes in New Madrid weren't the first. What is the evidence for previous earthquakes and when did they occur.
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ABOUT TO GO AWAY: IRIS is going to discontinue Flash animations in 2020. If you have a Flash player app and would like a copy, download this .swf file.
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