Rupture model of the 2011 Mineral, Virginia, earthquake from teleseismic and regional waveforms

We independently invert teleseismic P waveforms and regional crustal phases to examine the finite fault slip model for the 2011 M-w 5.8 Mineral, Virginia, earthquake. Theoretical and empirical Green's functions are used for the teleseismic and regional models, respectively. Both solutions show two distinct sources each about 2km across and separated by 2.5km. The source at the hypocenter is more localized in the regional model leading to a higher peak slip of 130cm and higher average stress drop of 250 bars compared with 86cm and 150 bars for the same source in the teleseismic model. Both sources are centered at approximately 8km depth in the regional model, largely below the aftershock distribution. In the teleseismic model, the sources extend updip to approximately 6km depth, into the depth range of the aftershocks. The rupture velocity is not well resolved but appears to be near 2.7km/s.