3.13 Attu section
The Attu section (Figure 6) extends ~400 km from Murray Canyon to the western terminus of the 1965 Mw 8.7 rupture. It encompasses the hypothesized Buldir and Near blocks of Geist et al. (1988) and two of the three high-slip asperities in the 1965 event proposed by Beck and Christensen (1991).
We directly incorporate the model of Cross & Freymueller (2008) depicting 62% coupling extending ~120 km arcward from the deformation front, corresponding to a lower depth of ~40 km along the subduction interface (Figure 6).