Largest earthquakes in California during the past half century:

— Magnitude 7.5, Kern County, near Bakersfield, July 21, 1952

— Magnitude 7.3, Landers, Southern California desert, June 28, 1992

— Magnitude 7.1, Hector Mine, near Joshua Tree, Oct. 16, 1999

— Magnitude 7.1, Petrolia, April 25, 1992

— Magnitude 7.0, Loma Prieta, San Francisco Bay area, Oct. 17, 1989

— Magnitude 6.7, Northridge, Jan. 17, 1994

— Magnitude 6.6, Sylmar, Feb. 9, 1971

— Magnitude 6.5, preliminary reading, Cambria, Dec. 22, 2003

— Magnitude 6.5, Borrego Mountain, April 9, 1968

— Magnitude 6.4, Imperial Valley, Oct. 5, 1979

— Magnitude 6.2, Superstition Hills, near Salton Sea, Nov. 24, 1987

Source: U.S. Geological Survey