Skip to main content
Earthquake Hazards Program

Special Earthquakes, Earthquake Sequences, and Fault Zones

Collapse of Fourth Avenue near C Street, Anchorage, due to earthquake caused landslide. Before the earthquake, the sidewalk at left, which is in the graben, was at street level on the right. The graben subsides 11 feet in response to 14 feet of horizontal movement. Anchorage district, Cook Inlet region, Alaska. 1964.

usgs.gov

official website of the U.S. Department of the Interior

Looking for U.S. government information and services?  Visit USA.gov