(a) Distributed moment release rates and after inversion of the strain-rate field for distributed faulting, distributed steady deep slip, and with Class 1, 2 and 3 faults held fixed to ‘revised’ or a priori values (see text, Sections 5.3 and 5.6). Isolines are each 0.2 × 10¹⁴ N m (km² yr)⁻¹. The combined contributions of distributed faulting and distributed deep slip (b) and Sierra Nevada block perturbation (c) to strain-rate field are shown in terms of the amplitudes and directions of the principal strain-rates axes and rotational strain rate. For the inversion described in Section 5.7, the components of the strain-rate field on Model 4 contributed by: (d) relaxation following earthquakes on Class 1 faults using the ‘revised’ slip amplitudes; (e) relaxation following earthquakes on Class 2+3 faults using estimated slip amplitudes and a priori amplitude, respectively and (f) tectonic forces. Parts D and E are identical to Figs 7(a) and (b), respectively. (g) sum of all contributions shown in parts (c) to (f). Thick and thin green line segments denote contractile and tensile principal strain axes, respectively, at selected points for visual clarity.