Figure 1: (Top) Regional setting of the Sandwich Plate, where the August 12, 2021 magnitude-7.5 and magnitude-8.1 earthquakes occurred. Arrows show relative plate velocities at block boundaries. White box indicates extents of maps in Figures 2 and 3. Lower inset shows map location on a lower hemisphere projection of the globe. Map produced using tectoplot (Bradley, 2021) with assistance from Bryan Low Kai Sheng.