To the north in Oakland, the Warren Freeway lies in a so called "rift" valley formed by the Hayward fault. A rift valley forms where the rocks have been ground up by the fault movement and stream erosion has carried away the fault shatterred rock, creating a valley.
The Hayward fault crosses through the shopping area in the Montclair district of Oakland located on the east side of the "rift" valley.
Fault creep is observed bending the curbs along the streets in
the Montclair district.
OAKLAND TO BERKELEY
Continuing to the north, this aerial view looks from Oakland toward the City of Berkeley. Lake Temescal, in the central part of the picture, lies at the northern end of the Hayward "rift" valley. It was formed in 1866 by the damming of Temescal Creek. The Hayward fault runs along the right side of the lake.
Find the Claremont Hotel, the big white building in the lower right part of the picture and Berkeley football stadium near the bottom. These are landmarks for locating the Hayward fault.
The Hayward fault runs under Berkeley Stadium and poses a severe hazard if a damaging earthquake occurs during a football game when tens of thousands of people are in the stands.
The Hayward fault runs from goal post to goal post across the stadium.
Fault creep is slowly deforming the Berkeley Stadium. These people are looking at the offset illustrated in the next picture.
Offset of expansion joints and fracturing of the exterior walls result from a third of a meter or about 13 inches of fault movement that has deformed the structure since it was built in 1923.
