2014 Iquique Earthquake (IMAGE) University of California - Santa Cruz Caption This schematic illustration of the 2014 Iquique earthquake off the coast of Chile (magnitude 8.1) shows the locations of foreshocks (blue) and aftershocks (red) relative to the area of large slip on the fault (contour lines). The mainshock involved thrust faulting on the plate boundary between the underthrusting Nazca and the overriding South American plates. Credit Wetzler et al., <i>Science Advances</i>, Feb-2018 Usage Restrictions For use only with news coverage of this research License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.