Fourth Avenue landslide scarp, Anchorage, Alaska. 1964.

Alaska Earthquake March 27, 1964.
Scarp at the subsidence trough or graben of the Fourth Avenue landslide, downtown 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, which was not involved in the subsidence. The graben subsided 11 feet in response to 14 feet of horizontal movement of the slide block during the earthquake. Published in U.S. Geological Survey Professional paper 541, Figure 17, p.21. 1966.