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Coulomb stress analysis of the 21 February 2008 Mw= 6.0 Wells, Nevada, earthquake

Nevada Bureau of Mines and Geology Special Publication 36
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Abstract

Static Coulomb stress changes imparted by the February 21, 2008 Wells, Nevada earthquake are calculated, using an 8 x 6 km rectangular patch with a uniform slip as a source fault. Stress changes are resolved on nearby active faults using their rake, dip, and strike direction, assuming a fault friction of 0.4. The largest Coulomb stress increase (0.2 bars) imparted to surrounding major active faults from the Wells earthquake occurs on the Clover Hill fault, which may be the southern continuation of the ruptured fault. A 0.1 bar Coulomb stress increase is calculated on the western Snake Mountains fault. Coulomb stress decreases of 0.5 bars are calculated for the northern parts of the Independence and Ruby Mountains faults. The Coulomb stress change is calculated on relocated aftershocks assuming that they have the same strike, dip, and rake, as the source fault. Under this assumption, 75% of the aftershocks received a Coulomb stress increase.

Additional publication details

Publication type Report
Publication Subtype State/Local Government Series
Title Coulomb stress analysis of the 21 February 2008 Mw= 6.0 Wells, Nevada, earthquake
Series title Nevada Bureau of Mines and Geology Special Publication
Series number 36
Year Published 2011
Language English
Publisher Nevada Bureau of Mines and Geology
Contributing office(s) Earthquake Science Center
Description 8 p.
First page 197
Last page 204
Country United States
State Nevada
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