The Hayward Fault
Scientists have been studying the past earthquakes on the Hayward fault. They have found that the most recent 5 major earthquakes happened on average every 140 years. Since it has been more than 144 years since the last major earthquake, the clock is ticking. It is very likely that the Hayward fault will rupture and produce a significant earthquake within the next 30 years.
The Hayward fault is not our only fault. It is a member of the San Andreas Fault system that runs from the Gulf of California in the south, to Cape Mendocino in the north. The San Andreas Fault system forms the boundary between the North American and the Pacific tectonic plates. In the Greater Bay Area, it San Andreas, which continues north up the peninsula, has several branches. Starting in the south near Hollister, the Calaveras Fault branches off to run east of San Jose and continue through Pleasanton and Danville toward Walnut Creek. Near San Jose the Hayward Fault branches off the Calaveras and continues north along the foot of the East Bay Hills. For residents of the East Bay, the Hayward fault is of particular concern because
An inSAR image of the east side of UC Berkeley and the Hayward fault (red). Notable structures include Memorial Stadium and the Greek Theater.it runs through many cities such as San Jose, Fremont, Hayward, San Leandro, Oakland, Berkeley, El Cerrito and Richmond. Today, more than 2.4 million people live close to the fault and are at great risk when the next significant earthquake occurs.
Please take some time to prepare yourself and your family in the unfortunate event of the 'Big One'. Click the 'Hazards and Preparedness' link at the top of the page for more information and great resources to help you.