Ray Weldon, University of Oregon (IMAGE) University of Oregon Caption Ray Weldon, head of geological sciences at the University of Oregon, led a research team that has produced a 1,000-year chronology of earthquakes and lake conditions at the southern end of the San Andreas Fault. Credit University of Oregon 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.