Road Damage (IMAGE) University of California - Riverside Caption Damage to Highway 12 due to the South Napa earthquake (left) and, one day later, the afterslip that followed it (right). Credit Tim Dawson, California Geological Survey 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.