Finite-fault slip model of the 2011 M w 5.6 Prague, Oklahoma earthquake from regional waveforms

Xiaodan Sun; Stephen H. Hartzell

doi:10.1002/2014gl060410

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Finite-fault slip model of the 2011 M w 5.6 Prague, Oklahoma earthquake from regional waveforms

Xiaodan Sun·Stephen H. Hartzell

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Abstract

The slip model for the 2011 M w 5.6 Prague, Oklahoma, earthquake is inferred using a linear least squares methodology. Waveforms of six aftershocks recorded at 21 regional stations are used as empirical Green's functions (EGFs). The solution indicates two large slip patches: one located around the hypocenter with a depth range of 3–5.5 km; the other located to the southwest of the epicenter with a depth range from 7.5 to 9.5 km. The total moment of the solution is estimated at 3.37 × 10 24 dyne cm (M w 5.65). The peak slip and average stress drop for the source at the hypocenter are 70 cm and 90 bars, respectively, approximately one half the values for the M w 5.8 2011 Mineral, Virginia, earthquake. The stress drop averaged over all areas of slip is 16 bars. The relatively low peak slip and stress drop may indicate an induced component in the origin of the Prague earthquake from deep fluid injection.

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Source-reported bounding extent: 35.47043° to 35.501523° latitude; -96.720112° to -96.674473° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Xiaodan Sun, Stephen H. Hartzell. 2014-06-27. Finite-fault slip model of the 2011 M w 5.6 Prague, Oklahoma earthquake from regional waveforms. https://doi.org/10.1002/2014gl060410

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