Seismotectonic map showing faults, igneous rocks, and geophysical and neotectonic features in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky

Wheeler, Russell L.; Rhea, Susan; Diehl, Sharon F.; Drahovzal, James A.; Bear, Glenn W.; Sargent, Michael L.

doi:10.3133/i2583d

1997

DOI: 10.3133/i2583d

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Seismotectonic map showing faults, igneous rocks, and geophysical and neotectonic features in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky

Russell L. Wheeler¹,

Susan Rhea²,

Sharon F. Diehl³

et al.

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Cited by 10 publications

References 54 publications

(56 reference statements)

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The 6 June 2003 Bardwell, Kentucky, Earthquake Sequence: Evidence for a Locally Perturbed Stress Field in the Mississippi Embayment

Horton

Kim

Withers

2005

Bulletin of the Seismological Society of America

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This article describes an unusually well-behaved, unusually welldocumented central and eastern United States (CEUS) earthquake sequence. Detailed analysis of regional and local waveform data from the 6 June 2003 Bardwell, Kentucky, earthquake indicates that the mainshock has the seismic moment of M 0 1.3 ‫)5.0ע(‬ ‫ן‬ 10 15 N m (M w 4.0) and occurred at a depth of about 2 ‫)1ע(‬ km on a near-vertical fault plane. A temporary seismic network recorded 85 aftershocks that delineate an east-trending fault approximately 1 km in length. The hypocenters illuminate a vertical plane between 2.0 and 2.7 km depth. The centroid of the aftershock distribution is at 36.875Њ N, 89.010Њ W and a depth of 2.4 km. The aftershock cluster is interpreted as a circular fault area with a radius of 0.44 ‫)30.0ע(‬ km. This source radius yields a static stress drop, Dr ‫ס‬ 67 ‫)41ע(‬ bars for the mainshock. The focal mechanism for the mainshock has strike ‫ס‬ 90Њ, dip ‫ס‬ 89Њ, and rake ‫ס‬ ‫561מ‬Њ with a subhorizontal P axis trending 135Њ. A formal stress inversion based on the focal mechanisms of the mainshock and ten aftershocks indicates the maximum compressive stress trends 104Њ with a plunge of 5Њ. The local stress field near Bardwell is therefore rotated about 40Њ clockwise relative to 65Њ for eastern North America as a whole. The Bardwell earthquakes have the opposite sense of slip to earthquakes with east-trending nodal planes that occur near New Madrid, Missouri. This requires a significant local rotation of the stress field over a distance of 60 km.

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The 6 June 2003 Bardwell, Kentucky, Earthquake Sequence: Evidence for a Locally Perturbed Stress Field in the Mississippi Embayment

Horton

Kim

Withers

2005

Bulletin of the Seismological Society of America

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Seismic Velocity Model of the Central United States (Version 1): Description and Simulation of the 18 April 2008 Mt. Carmel, Illinois, Earthquake

Ramirez-Guzmán¹,

Boyd²,

Hartzell³

et al. 2012

Bulletin of the Seismological Society of America

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The Meadow Bank: A Nontectonic Linear Feature in the Wabash Valley Seismic Zone

Larson

Phillips

Elrick

2015

Seismological Research Letters

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Seismotectonic map showing faults, igneous rocks, and geophysical and neotectonic features in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky

Cited by 10 publications

References 54 publications

The 6 June 2003 Bardwell, Kentucky, Earthquake Sequence: Evidence for a Locally Perturbed Stress Field in the Mississippi Embayment

The 6 June 2003 Bardwell, Kentucky, Earthquake Sequence: Evidence for a Locally Perturbed Stress Field in the Mississippi Embayment

Seismic Velocity Model of the Central United States (Version 1): Description and Simulation of the 18 April 2008 Mt. Carmel, Illinois, Earthquake

The Meadow Bank: A Nontectonic Linear Feature in the Wabash Valley Seismic Zone

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