Fig. 1
From: Rapid tremor migration and pore-pressure waves in subduction zones
Analysis of the non-linear diffusion equation under plausible conditions for the Guerrero subduction zone. a Pore-pressure wave propagation predicted by Eq. (2), where p* = p − p0. Circles show the position of the wave front for a pore-pressure threshold of 3 kPa and color shaded the time in hours. b Wave front propagation (circles in panel a) and average speed after 15 km. c Parametric study of Eq. (2) in terms of wave speeds for a threshold of 3 kPa (see Supplementary Figure 3 for different permeabilities). Speed values between the black curves include those observed for RTMs in Guerrero. Red box delineates γ values observed in laboratory experiments40 and the maximum pore-pressure gradient induced by the 2006 SSE (lower limit). d Guerrero RTM speeds bounded by the two theoretical limits indicated with white circles in panel c
