(a) Back slip rate distribution on fault plane (Dip slip component). Blue arrows represent the observed horizontal velocity field, red arrows represent the modelled horizontal velocity field resulting from the block modelling inversion. (b) Velocity sections AA’ and BB’ (30 km width) across SRF and CF respectively, showing the profile-parallel velocity components of both observed and modelled velocity field. Black lines indicate the polynomial best-fitting curves of the forwarded velocities. Relocated seismicity and faults trace from Giuffrida et al. (2023).