United States - Number of strong earthquakes by state

This statistic shows the Number of strong earthquakes in the U.S. from 1974 to 2003, by state. From 1974 to 2003, 12,053 strong earthquakes have been recorded in Arkansas.

Number of strong earthquakes in the U.S. from 1974 to 2003, by state*

Characteristic	Number of earthquakes
Alaska	12,053
California	4,895
Hawaii	1,533
Nevada	778
Washington	424
Idaho	404
Wyoming	217
Montana	186
Utah	139
Oregon	73
New Mexico	38
Arkansas	34
Arizona	32
Colorado	24
Tennessee	22
Missouri	21
Texas	20
Illinois	17
Oklahoma	17
Maine	16
New York	16
Alabama	15
Kentucky	15
South Carolina	10
South Dakota	10
Virginia	10
Nebraska	8
Ohio	8
Georgia	7
Indiana	6
New Hampshire	6
Pennsylvania	6
Kansas	4
North Carolina	3
Massachusetts	2
Michigan	2
Minnesota	2
Mississippi	2
New Jersey	2
Louisiana	1
Rhode Island	1
West Virginia	1
Connecticut	0
Delaware	0
Florida	0
Iowa	0
Maryland	0
North Dakota	0
Vermont	0
Wisconsin	0

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Release date

June 2012

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Region

United States

Survey time period

1974 to 2003

Supplementary notes

* The data represents earthquakes of a magnitude range of 3.5 and greater.
Number of strong earthquakes in total: 21,080.
Events in the magnitude range of 3.5 to 4.0 in the Aleutian Islands are not recorded on enough seismograph stations to be located.
The expression Richter magnitude scale refers to a number of ways to assign a single number to quantify the energy contained in an earthquake. In all cases, the magnitude is a base-10 logarithmic scale obtained by calculating the logarithm of the amplitude of waves measured by a seismograph. An earthquake that measures 5.0 on the Richter scale has a shaking amplitude 10 times larger and corresponds to an energy release of v1000 ˜ 31.6 times greater than one that measures 4.0.

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