Skyler Cummings U.S Most Important Earthquakes By mrsdrouare Period: Jan 1, 1932 to Dec 31, 2011 Skyler Cummings U.S Most Important Earthquakes Dec 21, 1932 Cedar Mountain, Nevada 7.2 Jan 23, 1938 Maui,Hawii 6.8 Apr 1, 1946 unimak island ,alaska 7.3 Aug 23, 1954 stllwater, navada 6.8 Aug 18, 1959 hebgen lake, montana 7.3 Apr 29, 1965 seattle, wisconson 6.5 Feb 9, 1971 sylmar, california 6.7 Oct 15, 1979 imperial vallry, california 6.4 Oct 28, 1983 borah peak idaho 7.0 Mar 6, 1988 gulf of alaska 7.8 Aug 17, 1991 honeydew california 7.1 Jan 17, 1994 northridge california 6.1