Its last major earthquake occurred on October 21st, 1868, destroying downtown Hayward, killing 5 people and, injuring 30. It is parallel to and east of its more famous (and much longer) sister fault, the San Andreas Fault. The Hayward fault is a 90 kilometer long crack in the Earth's crust that travels through the San Francisco Bay area.

The Hayward Fault Zone derived its name from the city of Hayward in the San Francisco Bay Area. Its last major rupture occurred in 1868, during California's frontier days, and was the original "Great San Francisco Earthquake" until 1906.

A new report from the U.S. Geological Survey says the biggest danger may be the Hayward Fault, because 2 million people live directly on top of it

The Hayward Fault runs along the foot of the East Bay hills, something that all residents of the Bay Area, and the East Bay in particular, should know.

The Hayward Fault Zone is located in northern California in the San Francisco Bay Area.