Lake Temescal Seismic Activity

Lake Temescal sits right on top of the Hayward fault. There is a vertical crack under the lake, caused by the movement of the earth's plates. The Temescal Dam has survived two major earthquakes; however, those were caused by movement along the nearby San Andreas fault and not the Hayward fault. If the dam were to fail, parts of Oakland would likely flood. You'll learn more about how the fault is measured as you walk around the lake.