After comparing waveform fits based on the two planes of the input moment tensor, we find that a solution adjusted from the nodal plane striking towards 252.0 deg. fits the data better. The adjusted solution uses 4 plane segments (see Table 1 below) designed to match a priori knowledge of the fault (e.g., 3D slab geometry). The seismic moment release based upon this solution is 1.9e+27 dyne.cm (Mw = 7.4) using a 1D crustal model interpolated from CRUST2.0 (Bassin et al., 2000).
SegmentStrike (deg.)Dip (deg.)
1252.044.0
2252.033.0
3252.024.0
4252.013.0

Table 1. Multi-Segment Parameters.