Unified Interior Regions

Broken concrete divider near the intersection of Summit Road and Highway 17.

Ground shaking triggered liquefaction in a subsurface layer of sand, producing differential lateral and vertical movement in a overlying carapace of unliquified sand and silt, which moved from right to left toward the Pajaro River. This mode of ground failure, termed "lateral spreading," is a principal cause of liquefaction-related earthquake damage.

Partially razed earthquake-damaged unreinforced-masonry buildings in Old Town historical district, City of Salinas.

Support-column failure and collapsed upper deck, Cypress viaduct.

Unfastened bookcases in an office building fell during the primary shock.

A crack system destroys driveway adjacent to summit road 0.8 km (1/2 mi) southeast of Highway 17.

Clock tower near north end of Pacific Garden Mall. Not known if clock was fast or if it ran for about 6 minutes after the earthquake.

Crack down front of Ford's Department Store, downtown Watsonville. Although this fracture appears minor, the building was significantly damaged.

Bent reinforcement bars in failed support column, Cypress viaduct.

Books and air-conditioning duct were dislodged during the earthquake.

A geologist traces surface cracks in a corral adjacent to summit road approximately 1.6 km (1 mi) southeast of Highway 17.