Rupture dimensions of an earthquake fault are important parameters for characterizing the earthquake rupture and studying earthquake mechanics. They have been inferred from aftershock distribution (Alparone and Gambino 2003), seismic reflection and refraction imaging (Minshull and Hall 1997; Catchings et al. 2008), and inversions based on various geophysical and geological data (Vos et al. 2006; Cho and Nakanishi 2000; Hayes and Wald 2009; Huang et al. 2008). However, the results from different methods are often significantly different, especially for the rupture depth (Heermance et al. 2003).

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