San Andreas Fault and Plate Boundaries (IMAGE) DOE/Oak Ridge National Laboratory Caption The San Andreas Fault (red lines) and the other plate boundaries (green lines). Color contours indicate the presumed fault slip distribution of the 1700 Cascadia Subduction Zone earthquake. Circles show the earthquake distribution in 1900-2019. Disastrous earthquakes (purple circles) and damaged cities are shown with the M7.1-2019 Ridgecrest earthquake (red circle). Credit UTokyo 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.