Effective geodetic slip rates at block boundaries estimated from model D. Thick coloured line is the eastern boundary of the NAS. Dotted lines are block boundaries supported by GPS data. (b) Comparison between geological (from literature) and geodetic (this study) slip rates (blue dots). See text and Table S2 for discussion and references. Available geological slip rates are plotted, as average rates, with their uncertainties derived from the range of reported values. Horizontal (geological) and vertical (geodetic) blue lines at blue dots (average rates) depict uncertainties. For visualization, geodetic uncertainties are 2σ. Lowercase letters correspond to fault sections: Puna (a), Pallatanga-northern segment (b), Cosanga (c), Chingual (d), Algeciras-Sibundoy (e), Guaycaramo fault (f), Boconó south (g), Boconó central (n), Boconó north (m), Oca-Ancon (h), Santa Marta-Bucaramanga (i) and Latacunga (j).