EARTHQUAKE HAVE STEADILY INCREASED OVER THE PAST 30 YEARS
(Quakes from 4.0 to 9.9 consistently increase during the period from 1970 to 1999)
There
were 12,410 more quakes in the 1980's than in the 1970's (53,610 - 41,200
= 12,410).
There
were 24,070 more quakes in the 1990's than in the 1990's (77,680 - 53,610
= 24,070).
Data from National Earthquake
Information Center (NEIC) World Data Center for Seismology, Denver
THE
TEN YEAR PERIOD FROM 1970 TO 1979
http://wwwneic.cr.usgs.gov/neis/eqlists/1970s.html
Magnitude 1970
1971 1972 1973 1974
1975 1976 1977 1978 1979
8.0 to 9.9
0 1
0 0
0 1
2 2
0 0
= 6
7.0 to 7.9
20 19
15 13
14 14
15 11
16 13 = 150
6.0 to 6.9
110 112 110
95 99 107
114 89
93 100
5.0 to 5.9
1195 1331 1316 1331
1312 1447 1649 1686
1526 1366
4.0 to 4.9
2355 2338 2300 2576
2598 2608 2550 2405
2602 3024
TOTALS
3680
3801 3741 4515 4023 4177
4330 4193 4237 4503 = 41,200
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THE
TEN YEAR PERIOD FROM 1980 TO 1989
http://wwwneic.cr.usgs.gov/neis/eqlists/1980s.html
Magnitude 1980
1981 1982 1983 1984 1985
1986 1987 1988 1989
8.0 to 9.9
1 0
0 0
0 1
1 0
0 1
= 4
7.0 to 7.9
13 13
10 14
8 13
5 11
8 6
= 101
6.0 to 6.9
105 90
85 126 91
110 89 112
93 79
5.0 to 5.9
1299 1168 1425 1673
1579 1674 1665 1437 1485
1444
4.0 to 4.9
3271 3209 3232 3563
3683 4281 4476 4146 4018
4090
TOTALS
4689 4480 4752 5083
5361 6079 6236 5706
5604 5620 = 53,610
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THE
TEN YEAR PERIOD FROM 1990 TO 1999
http://wwwneic.cr.usgs.gov/neis/eqlists/eqstats.html#table_2
Magnitude
1990
1991 1992 1993 1994 1995
1996 1997 1998 1999
8.0 to 9.9
0 0
0 1
2 3
1 0
2 0
9
7.0 to 7.9
12 11
23 15
13 22
21 20
14 23
= 174
6.0 to 6.9
115 105 104
141 161 185
160 125 113
123
5.0 to 5.9
1635 1469 1541 1449 1542
1327 1223 1118 979
1106
4.0 to 4.9
4493 4372 5196 5034 4544
8140 8794 7938 7303
7042
TOTALS
6255 5957 6864 6640 6262
9677 10119 9201 8411 8294
= 77,680
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BELOW SEEMS TO BE FAULTY NEIC INFORMATION
Frequency of Occurrence of Earthquakes
Based on Observations since 1900
http://wwwneic.cr.usgs.gov/neis/eqlists/eqstats.html#table_2
Descriptor Magnitude Average
Annually
Great
8 & over
1
Major
7 - 7.9
18
Strong
6 - 6.9
120
Moderate 5 - 5.9
800
Light
4 - 4.9
6,200 (est.)