Extended Data Fig. 3: Snapshots of the full-field distributions of fault-parallel particle velocity and shear stress change during the initial phase of the first rupture sequence.

The full-field maps show, top to bottom, the supershear rupture arrest (event A) at t = 38.6 μs, the arrival of the sub-Rayleigh rupture (event B) at t = 44.6 μs, its propagation (t = 50.6 μs), and subsequent arrest (t = 56.6 μs). Note that the stress concentration at the arrest time of event B is relatively minor and at a different location from where event E is dynamically re-nucleated later (Extended Data Fig. 4).