Earthquakes of North-Central Arkansas by Jerry Clark

This map illustrates the location and magnitude of reported earthquakes that have occurred in north-central Arkansas from 1965 to 2013. The data source for the earthquakes depicted on this map is derived from the Arkansas Geological Survey (AGS) earthquake catalog. The catalog has been compiled from various sources and publications and includes date, time, latitude, longitude, magnitude or intensity and depth information. Some event records may contain incomplete data due to their date and/or source. The AGS earthquake catalog is dynamic and continually updated as event parameters are modified, new events are added, and occasionally, events are deleted. The seismic areas/zones, illustrated on this map are derived from various geologic sources and publications on file at the AGS. Depicted seismic areas/zones, are for illustration purposes only and may not represent all the seismically active features within a given location or relate to the origin of the earthquakes depicted on this map.

Transcript

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Greenbrier EQ Swarm Area Damascus EQ Cluster Area (Note: 102 Events from 1.6 to2.5 Mag at this location) Quitman EQ Cluster Area Overcup Lake Grassy Lake Arkansas Ri ver Little Red River Illinois Bayo u South Fork Little Red River Red River Greers Ferry EQ Cluster Area Central Conway County EQ Cluster Area Rose Bud EQ Cluster Area Mount Vernon £ ¤ 67 £ ¤ 64 £ ¤ 65 £ ¤ 64 £ ¤ 167 £ ¤ 64 Conway Searcy Russellville Beebe Clinton Pottsville Fairfield Bay Guy Vilonia Atkins Morrilton Concord Holland Greenbrier Rose Bud Greers Ferry Heber Springs Dover Bald Knob London Twin Groves Shirley Hector Oppelo Wooster Mayflower Judsonia Menifee Enola Kensett Quitman Damascus Garner Bradford Plumerville Higginson McRae Higden Letona Pangburn Griffithville West Point Russell Georgetown White Pope Faulkner Conway Van Buren Cleburne § ¨ ¦ 40 U V 27 U V 124 U V 16 U V 25 U V 326 U V 9 U V 95 U V 36 U V 285 U V 225 U V 92 U V 263 U V 110 U V 123 U V 164 U V 267 U V 107 U V 305 U V 254 U V 89 U V 213 U V 287 U V 247 U V 105 U V 323 U V 310 U V 336 U V 333 U V 337 U V 365 U V 330 U V 356 U V 286 U V 385 U V 258 U V 210 U V 331 U V 363 U V 320 U V 132 U V 266 U V 65 U V 331 U V 92 U V 124 U V 107 U V 324 U V 9 U V 95 U V 305 U V 267 U V 92 U V 95 U V 27 U V 16 U V 385 U V 310 U V 324 U V 247 U V 225 U V 124 U V 258 U V 5 U V 124 U V 60 U V 287 U V 25 U V 16 U V 287 U V 13 U V 267 U V 285 U V 210 U V 330 U V 13 U V 363 U V 337 U V 323 U V 113 U V 336 U V 87 U V 336 U V 5 U V 87 U V 124 U V 326 U V 267 U V 326 U V 326 U V 225 U V 305 U V 107 U V 319 U V 89 U V 247 U V 321 E a r t h q u a k e s o f N o r t h - C e n t r a l A r k a n s a s Earthquake Symbols (2008 to Present) Magnitude Depth <1.9 km 5.0-5.9 km 6.0-6.9 km 7.0-7.9 km >8.0 km 2.0-2.9 km 3.0-3.9 km 4.0-4.9 km < 0.0 0.0 - 0.9 1.0 - 1.9 2.0 - 2.9 3.0 - 3.9 Compilation of Recent and Historic Earthquakes in the Greers Ferry Earthquake Cluster Area of the Fayetteville Shale Gas Play in North-Central Arkansas Compilation of Recent and Historic Earthquakes in the Central Conway County Earthquake Cluster Area of the Fayetteville Shale Gas Play in North-Central Arkansas Arkansas Earthquake Magnitudes MAG k 0.0 - 1.9 2.0 - 2.9 3.0 - 3.9 4.0 - 4.9 5.0 - 5.9 6.0 - 6.9 7.0 - 7.9 Arkansas Geological Survey Bekki White, Director and State Geologist Compilation by Jerry W. Clark 2013 Abstract The North-Central Earthquake Region represents the most seismically active zone in Arkansas in the past few years. The Arkansas Geological Survey has developed several earthquake-related products to provide the public and private sector with usable information to make informed decisions. This map illustrates the location and magnitude of reported earthquakes that have occurred in north-central, Arkansas from 1965 to 2013. The data source for the earthquakes depicted on this map is derived from the Arkansas Geological Survey (AGS) earthquake catalog. The catalog has been compiled from various sources and publications and includes date, time, latitude, longitude, magnitude or intensity and depth information. Some event records may contain incomplete data due to their date and/or source. The AGS earthquake catalog is dynamic and continually updated as event parameters are modified, new events are added, and occasionally, events are deleted. The seismic areas/zones, illustrated on this map are derived from various geologic sources and publications on file at the AGS. Depicted seismic areas/zones, are for illustration purposes only and may not represent all the seismically active features within a given location or relate to the origin of the earthquakes depicted on this map. Other AGS Geohazard related products include: North-Central Earthquake Region Map, Central Conway County Earthquake Cluster Area Map, Damascus Earthquake Cluster Area Map, Enola Earthquake Cluster Area, Greenbrier Earthquake Cluster Area Map, Greers Ferry Earthquake Cluster Area Map, Guy-Greenbrier Earthquake Cluster Area, Quitman Earthquake Cluster Area Map, Rose Bud Earthquake Cluster Area Map, Searcy Earthquake Cluster Area Map and Stumptoe Earthquake Cluster Area Map.