Mid-continental tremblers might be aftershocks of big quakes

11/4/2009 | USA Today

Earthquakes from mid-continent faults could be viewed not as new seismic activities but as delayed aftershocks of major quakes, according to a study by U.S. researchers. Mid-continental quakes usually produce aftershocks that could occur after hundreds of years compared with those generated by continental edge faults, which spawn aftershocks only days later.

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