Spatio-temporal evolution of the 2011 Prague, Oklahoma aftershock sequence revealed using subspace detection and relocation
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- Data Release: USGS data release - Aftershock Catalog for the November 2011 Prague, Oklahoma Earthquake Sequence
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Abstract
The 6 November 2011 Mw 5.7 earthquake near Prague, Oklahoma is the second largest earthquake ever recorded in the state. A Mw 4.8 foreshock and the Mw 5.7 mainshock triggered a prolific aftershock sequence. Utilizing a subspace detection method, we increase by fivefold the number of precisely located events between 4 November and 5 December 2011. We find that while most aftershock energy is released in the crystalline basement, a significant number of the events occur in the overlying Arbuckle Group, indicating that active Meeker-Prague faulting extends into the sedimentary zone of wastewater disposal. Although the number of aftershocks in the Arbuckle Group is large, comprising ~40% of the aftershock catalog, the moment contribution of Arbuckle Group earthquakes is much less than 1% of the total aftershock moment budget. Aftershock locations are sparse in patches that experienced large slip during the mainshock.
Suggested Citation
McMahon, N.D., Aster, R.C., Yeck, W.L., McNamara, D.E., Benz, H.M., 2017, Spatio-temporal evolution of the 2011 Prague, Oklahoma aftershock sequence revealed using subspace detection and relocation: Geophysical Research Letters, v. 44, no. 14, p. 7149-7158, https://doi.org/10.1002/2017GL072944.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Spatio-temporal evolution of the 2011 Prague, Oklahoma aftershock sequence revealed using subspace detection and relocation |
| Series title | Geophysical Research Letters |
| DOI | 10.1002/2017GL072944 |
| Volume | 44 |
| Issue | 14 |
| Publication Date | July 18, 2017 |
| Year Published | 2017 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 10 p. |
| First page | 7149 |
| Last page | 7158 |