Fig. 7: Modelled normal stress and apparent friction along the Sunda megathrust.
From: Bridging the gap between subduction dynamics and the long-term strength of the Sunda megathrust
a Map of the deviatoric normal stress (\(\tau_{\rm{n}}\)) on the megathrust in the Model 3c. The magenta line with squares marks the location of the trench. Contour lines represent variations in megathrust depth. b) Megathrust deviatoric normal stress (\(\tau_{\rm{n}}\)) projected in Cartesian space, overlaid with seismicity data from the 1964-2021 ISC-EHB catalogue62, with available rupture lengths. c Plot of moment magnitude (Mw) versus normal stress (\(\tau_{\rm{n}}\)) for the earthquakes shown in (b). The \(\tau_{\rm{n}}\) values are sampled at the locations of the earthquakes. Probability density functions (pdfs) for the \(\tau_{\rm{n}}\) distribution are displayed at the top of the panel, while pdfs for the energy released (weighted magnitude) are shown on the side. d Map of the apparent friction (μ) on the megathrust in the Model 3c and rupture surface of the three highest energy earthquakes (yellow thick contours). e Apparent friction projected in Cartesian space, overlaid with seismicity data as in (b). f Plot of moment magnitude (Mw) versus apparent friction for the earthquakes shown in panel, as in (c). All the panels were created with open-source software Python and library Matplotlib.
