Fig. 5: Modeling of coseismic uplift events in Nagura (see Method).
a Map of the potential rupture zones along the plate interface (blue and orange ellipse). Green dots: 0 B.C. event data location15,16. Red rectangle: site location. Dotted gray lines: plate interface isodepth every 10 km (0 at the trench). Dark gray line: Location of cross-sections in (b). Red line with arrows: the Ryukyu trench. Ellipses are investigated potential rupture zones, with uncertain length. Panel produced using the Generic Mapping Tool software (https://www.generic-mapping-tools.org/) b) The colored points with gray error bars are inferred uplift events with their associated uncertainties (Supplementary Table S5). Red curves: vertical deformation at the surface promoted by slips between 8 and 25 m on the plate interface between 0 and 50 km depth, associated hinge line: vertical dashed red line. Blue curves: vertical deformation at the surface promoted by slips between 1 and 9 m on the plate interface between 33 and 60 km depth, associated hinge line: vertical dashed blue line. Magnitude of earthquakes corresponding to dislocations on the portion of the megathrust between 33 and 60 km and on the megathrust between 0 and 50 or 60 km are indicated in blue and black, respectively. Maximum magnitude is estimated using a length of ~300 km of the rupture zone along the southern Ryukyus, between Yonaguni and Miyako islands (Fig. 1).
