All Maps
Explore all USGS Maps and refine your search by type, topic, year, location, and advanced search.
Filter Total Items: 9586
Map showing evidence for recent fault activity in the vicinity of Antioch, Contra Costa County, California Map showing evidence for recent fault activity in the vicinity of Antioch, Contra Costa County, California
The U.S. Geological Survey, in cooperation with other federal, state, and local agencies, is studying active and potentially active faults in the counties surrounding San Francisco Bay as past of a program to define and clarify geologic hazards in the region. Much more detailed information about known faults has been collected; in addition, poorly known or previously unknown zones of...