“Memorable Alley quote” Alley Earthquake Pun “Memorable Alley quote” GEOSC 010 Earthquake Slides, Fall 2005 Prof. Richard B. Alley

Areas of uplift and subsidence Alaska Earthquake, 1964 Areas of uplift and subsidence Copyright © 2004 by David K. Snyder. Permission is granted to use the information contained in these essays for academic or personal use.

AK, 1964. Scarp at the subsidence trough or graben of the Fourth Avenue landslide, Anchorage. Before the earthquake, the sidewalk in front of the stores on the right, which are in the graben, was at the level of the street on the left. text

AK, 1964. Marquee of the Denali Theater, in the graben of the Fourth Avenue landslide in Anchorage, subsided until it came to rest on the sidewalk in front of the theater. text

AK, 1964. Million Dollar Bridge on the Copper River Highway. text

AK, 1964. Government Hill School in Anchorage, viewed from the playground, looking west. The graben in the foreground is about 12 feet deep. text

AK, 1964. Northwest block (left) of the Hanning Bay fault displaced upward between 4 and 5 meters, relative to the southeast block, along a high angle reverse fault. The white coating on the upthrown block is calcareous algae and bryozoans that lived below mean sea-level. text

AK, 1964. Native Hospital landslide in Anchorage, showing graben and pressure ridge. text

AK, 1964. The channel-ward movement of stream banks composed of unconsolidated materials compressed and buckled many railroad bridges in the epicentral region. This bridge on the Kenai Peninsula buckled laterally. text

AK, 1964. Fissures in Seward Highway near the Alaska Railroad station at Portage, at the head of Turnagain Arm. text

TS UN AN MI This is what happens when I stay up too late (3:54 a.m.).

Tsunami videos placeholder USGS theoretical NW Pacific animation Seward before/after 1964

Guatemala earthquake, 1976. Stone fence, offset 2 Guatemala earthquake, 1976. Stone fence, offset 2.8 meters in a sinistral sense and 0.65 meters vertically. text

Loma Prieta, California earthquake, 1989 Loma Prieta, California earthquake, 1989. Crack system near Summit Road, half a mile southeast of Highway 17. text

Loma Prieta, California earthquake, 1989 Loma Prieta, California earthquake, 1989. Crack system destroys a driveway adjacent to Summit Road half a mile southeast of Highway 17. text

Loma Prieta, California, earthquake, 1989 Loma Prieta, California, earthquake, 1989. Liquefaction in recent deposits of the Pajaro River form sand volcanoes along extensional fissures near Pajaro. Furrows are spaced about 1.2 meters apart. text

text Loma Prieta California Earthquake, 1989. Left: Oakland. Collapsed sections of the Cypress viaduct of Interstate 880. Upper right, near lower right: Highway 1 twin bridges; Far lower right: Cement retaining walls along Highway 280. (click to expand) text

Loma Prieta California Earthquake, 1989. Left: Collapsed section of the San Francisco-Oakland Bay Bridge. Right: Roadbed collapse near interface of cantilever and truss sections of the San Francisco-Oakland Bay Bridge. View is northwest.