Figure 5. Rupture speed estimation from back projection and MPS inversion results. (a) Spatial and temporal distribution of the high frequency radiators derived from European array (diamonds) and Australian array (circles), plotted relative to the epicenter location and time. Two straight lines indicate the approximated averaged rupture speed towards east and west of the epicenter. Vertical bars are the spatial errors of the BP results (see Supplement for more details). (b) Overlaps of the BP and MPS results. Stars are the centroid location of subevents in MPS solution. Shaded curves represent the source time function of each subevent, both the stars and beach balls are colored by the centroid time. The dashed line separates the high frequency radiators from the north and south branches of the bifurcation rupture. (c) A schematic cartoon shows the rupture (red lines) propagation through the fault bifurcation. The sandwiched/wedge block shows small eastward displacement because of the opposite motions from the rupture on the northern and southern fault segments.