Enola earthquake swarm

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]

References

1. "CERI – Public Awareness -". ceri.memphis.edu. Archived from the original on March 7, 2011.
2. Rabak, Ivan; Langston, Charles; Bodin, Paul; Horton, Steve; Withers, Mitch; Powell, Christine (1 May 2010). "The enola, Arkansas, intraplate swarm of 2001". Seismological Research Letters. 81 (3): 549–559. Bibcode:2010SeiRL..81..549R. doi:10.1785/gssrl.81.3.549. Retrieved May 23, 2024.
3. Rabak, I.; Bodin, P.; Langston, C.; Horton, S.; Withers, M.; Langston, T. (1 December 2002). "The Enola, Arkansas, Sequence of 2001: a Recurring Earthquake Swarm in "Stable Continental" Crust?". AGU Fall Meeting Abstracts. 2002: S22D–05. Bibcode:2002AGUFM.S22D..05R.
4. McFarland, John David (2001). "The May 2001 Faulkner County Earthquakes" (PDF). Arkansas Geological Commission: 1–5. Retrieved May 23, 2024.

External links

• Enola Swarm Area – Faulkner County, Arkansas Archived 2016-12-22 at the Wayback Machine from the Arkansas Geological Survey