Berkeley Seismological Laboratory




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Annual Report

July 2007 - June 2008




















Berkeley Seismological Laboratory

Annual Report

July 2007 - June 2008

























































Cover Picture

Alum Rock AlertMap: On October 30, 2007 the magnitude 5.4 Alum Rock earthquake rippled across the San Francisco Bay Area. The largest earthquake in the region since the 1989 Loma Prieta earthquake, it was felt by most people but caused little damage. The CISN early warning test system named ElarmS caught the earthquake. This map shows the distribution of ground shaking intensity predicted using the first few seconds of data recorded by seismometers near the epicenter in San Jose. The epicenter is shown as a star and the estimated magnitude is 5.2. The warmer colors show where the stronger shaking was predicted near the epicenter and the cooler colors show weaker shaking at greater distances. The predicted ground shaking is very accurate. The data used to generate this map was available a few seconds before the shaking was felt in San Francisco. (This picture is a simplified version of Figure 2.59 in Research Study 26.)



Berkeley Seismological Laboratory
215 McCone Hall, UC Berkeley, Berkeley, CA 94720-4760
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