This map represents a sampling of seismic events recorded near the town of Enola in central Arkansas. This seismically active area is known as the “Enola swarm area.” The first seismic event recorded here was a 1.2 magnitude earthquake that occurred on January12, 1982. Over 40,000 seismic events have occurred in the Enola swarm area since 1982, making it possibly the largest seismic swarm ever recorded in the central United States (Chiu et al., 1984). Most of the seismic events are microquakes, but numerous felt events have been experienced. During the first year of seismic activity, at least 93 earthquakes were felt in the Enola swarm area by at least one person.

We extend our appreciation to John David.McFarland III for compiling the original earthquake database used to make this map and for sharing his knowledge of Arkansas.Seismicity.  We would also like to thank the Center for Earthquake Research and Information (CERI) at the University of Memphis for seismic data used to generate this map.

• Color Map
• Paper size ~ 24" x 24"

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