2007 Pisco Earthquake (IMAGE) California Institute of Technology Caption The 2007 Pisco earthquake ruptured two patches (indicated by the contour lines of seismic slip in red) of the plate interface along which the Nazca plate slides under South America at about 6 cm/yr (red arrows). The black dots show the aftershocks triggered by this quake. Two other large earthquakes had ruptured the plate interface in 1974 and 1996 (green areas). Credit Caltech Tectonics Observatory Usage Restrictions With credit as given above 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.