The California Geological Survey (CGS) is a government agency dedicated to providing scientific products and services about t ... he state's geology, seismology and mineral resources including their related hazards, that affect the health, safety, and business interests of the people of California. The CGS is regarded as the primary source of geological and seismological products and services for decision making by California's government agencies, its businesses and the public. The CGS is a division of the California Department of Conservation @CalConservation. read more