Potential Disaster (IMAGE) Columbia Climate School Caption Potential quake zone. Solid red line indicates an area of about 24,000 square miles that could move during a subduction-zone earthquake, affecting 140 million people or more. The dashed line represents a scenario in which the slip might take place along a separate fault. Credit Chris Small/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given 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.