San Andreas fault in the Carrizo Plain, central California.
Scientific understanding of earthquakes is of vital importance to the Nation. As the population increases, expanding urban development and construction works encroach upon areas susceptible to earthquakes. With a greater understanding of the causes and effects of earthquakes, we may be able to reduce damage and loss of life from this destructive phenomenon.
A statue of Christ at Cemetery Hill overlooks the ruined town of Yungay, Peru. It and a few palm trees were all that remained standing after the May 31, 1970, earthquake.
U.S. Geological Survey
Information Services
P.O. Box 25286
Denver, CO 80225
★ U.S. GOVERNMENT PRINTING OFFICE: 1996—421-205