Whole Lot of Shaking (IMAGE) University of Iowa Caption A new study says the Ridgecrest earthquakes that shook southern California last July weakened a section of the nearby Garlock Fault, a major earthquake fault line. Credit Bill Barnhart, University of Iowa 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.