Recent research indicates that parts of the central and eastern United States may still be experiencing aftershocks from significant 19th-century earthquakes. The study analyzed seismic data from three historic quakes, concluding that some modern seismic activity in these areas could be long-lived aftershocks, mixed with background seismicity.
Aftershocks follow large earthquakes — sometimes for weeks, other times for decades. But in the U.S., some areas may be experiencing shocks from centuries-old events.
In the 1800s, some of the strongest earthquakes in recorded U.S. history struck…
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News Source: scitechdaily.com