Fig. 12

Relative variation of P-wave speed measured in the laboratory during cycles 1–3 (black line), as a function of the temperature on Westerly Granite (Griffiths et al. 2018). The blue and red dots represent, respectively, the relative variation P-wave speed and for S-wave speed deduced from the E(T), K(T) and density measurements of (Heard and Page 1982) also for Westerly Granite. The blue and red lines represent, respectively, the relative variation P-wave speed and for S-wave speed introduced in our simulation to take into account the experimental measurements of (Heard and Page 1982)