Map of Plate Boundaries (IMAGE) GFZ Helmholtz-Zentrum für Geoforschung Caption The Nazca Plate pushes from the West against the South American Plate with 66 mm/year, thus building up enormous pressure which is released through huge earthquakes. Credit M. Moreno et al./GFZ Usage Restrictions None 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.