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
 
 
Magnitude
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
TOTALS
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 
                   
41,200

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
 
 
Magnitude
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
TOTALS
8.0 to 9.9
                     
7.0 to 7.9
                     
6.0 to 6.9
                     
5.0 to 5.9 
                     
4.0 to 4.9
                     
TOTALS 
                   
53,610

 
 

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
 
 
Magnitude
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
TOTALS
8.0 to 9.9
                     
7.0 to 7.9
                     
6.0 to 6.9
                     
5.0 to 5.9 
                     
4.0 to 4.9
                     
TOTALS 
                   
77,680

   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.)