Auxiliary material for Paper 2013GL055827 Geometrical effects of a subducted seamount on stopping megathrust ruptures Hongfeng Yang^1*, Yajing Liu^{1,2}, and Jian Lin^1 1 Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA 2 Department of Earth and Planetary Sciences, McGill University, Montreal, QC H3A 2A7, Canada * now at Georgia Institute of Technology Geophys. Res. Lett., doi:10.1029/2013GL055827, 2013 Introduction The auxiliary material includes three additional figures. 1. supp.doc Figure captions and figures in the auxiliary material.