9/56 YEAR CYCLE: ARIZONA EARTHQUAKES- 1870-2005


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Appendix for the paper 9/56 year Cycles: Earthquakes & Volcanoes.


The Arizona Earthquake Information Center listed some 30 Arizona earthquakes (mag =>4.9) that have occurred since 1870. Of this figure, 14 took place in the 9 months ended October 15 of those years in the 9/56 year patterns as presented in Table B this appendix. Such a finding was highly significant (p < .001).

 

Table A    ARIZONA EARTHQUAKES: 1870-2005
(mag =>4.9)
Year Month Day Mag/Int Location
1872 05 02 VII Yuma
1875 11 03 VI Yuma
1878 12 17 VI Yuma
1887 11 11 VII Pantano
1888 07 25 VI Tombstone
1888 08 19 VI Yuma
1888 11 13 VI Yuma
1890 06 10 VI Yuma
1892 02 02 VI Flagstaff
1906 01 25 6.2 Flagstaff
1910 09 24 6.0 Cedar Wash
1912 08 18 6.2 Lockett Tanks
1916 03 03 VI Nogales
1916 12 12 VI St Michaels
1921 04 06 VI Holbrook
1922 06 17 VI Miami
1931 07 28 VI Cottonwood
1935 01 01 VI Grand Canyon
1935 01 02 VI Welton
1935 01 10 VI Grand Canyon
1937 04 08 VI  Grando
1938 09 29 VI Clifton
1939 03 09 VI Grand Canyon
1939 06 04 VI Duncan
1950 01 17 VII Grando T Post
1959 07 21 5.5 Fredonia
1959 10 13 5.0 Flagstaff
1976 02 04 4.9 Chino Valley
1993 04 25 4.9 Cataract Creek
1993 04 29 4.9 Cataract Creek
Years in bold experienced an earthquake =>4.9 mag in the 9 months ended October 15 of those years in Table B this appendix.
Source: Arizona Earthquake Information Center

                                                                                                                    

 

                                                                                      

Table B       9/56 YEAR CYCLE: MAJOR ARIZONA EARTHQUAKES

                    1872 1881 1890
           

1874

1883

1892

1901

1910 1919 1928 1937 1946

1894

1903

1912

1921

1930

1939
**

1948

1957

1966 1975 1984 1993
**
 

1950

1959
**

1968

1977

1986

1995

2004

  

         

2006

  

   

   

   

   

  

 

           

The 56 year sequences in the table are separated by an interval of 9 years.
Years in bold contain in major Arizonan earthquakes in the 9 months ended October 15 of those years in this table.

Source of Raw Data: Arizona Earthquake Information Center
.