EARTHQUAKE INDEX PAGE
Raw Rank
# quakes
State Total
# of
Through 1989 Area
of State
Seismicity
by USGS Name Quakes Years Quakes/
year
square mi. Index Rank
1
California
1449
213
6.80
163,707
42.1
2
2
Alaska
1383
203
6.81
656,424
10.4
6
3
Nevada
321
132
2.43
110,567
22.1
4
4
Hawaii
234
166
1.41
10,932
129.1
1
5
Washington
222
117
1.90
71,302
26.6
3
6
Oregon
127
97
1.31
98,386
13.3
5
7
Montana
67
117
0.57
147,046
3.8
11t
8
Utah
63
112
0.56
84,907
6.6
7
9
Idaho
43
105
0.41
83,574
4.9
8
10
New Mexico
38
134
0.28
121,598
2.3
16t
11
Wyoming
34
92
0.37
97,818
3.8
11t
12
Illinois
31
185
0.17
57,918
2.9
15
13
New York
25
252
0.10
54,471
1.8
19
14
Missouri
22
177
0.12
69,708
1.7
20t

S. Carolin
22
172
0.13
32,008
4.1
10

Colorado
22
118
0.18
104,100
1.7
20t
17
Arizona
20
111
0.18
114,006
1.6
24t
18
Virginia
19
215
0.09
42,777
2.1
18
19
Arkansas
16
178
0.09
53,182
1.7
20t

Tennessee
16
155
0.10
42,146
1.6
24t
21
Ohio
15
213
0.07
44,828
1.6
24t
22
Mass.
13
360
0.04
10,555
3.8
11t
23
Kentucky
13
220
0.06
40,411
1.5
28
24
Oklahoma
11
107
0.10
69,903
1.4
29t
25
Texas
10
98
0.10
268,601
0.4
34

New Hamp.
10
267
0.04
9,351
4.3
9

Maine
10
132
0.08
35,387
2.3
16t
28
Indiana
10
162
0.08
36,420
1.6
24t
29
Pennsy.
8
100
0.04
46,058
1.7
20t
30
S. Dakota
7
83
0.03
77,121
1.1
29t

N. Carolin
7
172
0.05
53,821
0.7
33
32
New Jersey
6
206
0.05
8,722
3.4
14

Kansas
6
126
0.05
82,282
0.6
32

Georgia
6
114
0.05
59,441
0.8
31
Raw Rank is based on USGS Prof. Paper #1527, number of quakes thru 1989
Seismicity Index = (Quakes / years / sq.mi. x 1,000,000)
Jim Berkland, Geologist, Aug 12, 1997
Return to Syzygy Home Page

sitemaster Will Fletcher