The Enola earthquake swarm was a series of earthquakes in 2001 that centered on Central Arkansas. It follows the earthquake swarms of Arkansas in the 1980s, and predates the Guy-Greenbrier earthquake swarm that started in 2010.[1] The earthquake sequence started with a 4.4 magnitude main shock and 2,500 earthquakes followed in the next 2 months.[2] These events resulted in a linear cumulative seismicity rate with a b value of nearly 1.0, which is an unusual result as compared to swarms other places.[3] The swarm created damage and in May 2001 the swarm increased activity with the notable 4.4 earthquake. The after shocks exceeding a magnitude of 2.0. These earthquakes have not been linked to the more well known New Madrid Seismic Zone. [4]
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