Appendix 5

INDIAN EARTHQUAKES & THE 9/56 YEAR CYCLE

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


Some 23 earthquakes were presented in the Earthquake History of India and How safe are we? (see Appendix 1), of which 10 took place preferentially in the 8 months ended August 30 of those years in the 9/56 year grid presented in Table A. The expected frequency was around 2.7. This grid was expanded to include 14 56 year sequences (see Table B), which contained 13 major earthquakes in the 12 months ended August 30 of those years in Table B (significant p < .01). 

There was limited information for pre 1850 Indian quakes with some serious errors being apparent. The Calcutta earthquake of October 11, 1737 fell in the 9/56 year grid in Table A, but it is questionable how severe this event actually was. The claimed death toll of 300,000 compared with the estimated 20,000 people living in the city at the time.

Seasonality may show up in Table A with two earthquakes happening on  January 10 and January 15 and two additional events taking place on March 29 and April 4.
 

1813  1821 1831  1840  1849 
1869
0110 
 1877 1887  1896  1905
0404
1925

1934
0115

1943 1952 1961
1981

1990

1999
0329
    

The 56 year sequences in the table are separated from each other by an interval of 9 years.
Source of Raw Data
: Earthquake History of India


On  the right hand side of Table B, earthquakes all happened in the three months ended August 21 with an anomaly on October 2005.  

1820 1829 1838
1876  1885
0530 
1894 

1932

1941
0626

1950
0815

1988
0806
0821

1997
0522
2006

The 56 year sequences in the table are separated from each other by an interval of 9 years.
Source of Earthquake Data
: Earthquake History of India

Table A           INDIAN QUAKES & 9/56 YEAR GRID: 1850 - 200
8 months ended August 30

1858  1867  1876  1885
0530 
1894 
1869
0110 
 1877 1887  1896  1905
0404

1914

1923

1932

1941
0626

1950
0815

1925

1934
0115

1943 1952 1961

1970

1979

1988
0806
0821

1997
0522
2006
1981

1990

1999
0329
                   

The 56 year sequences in the table are separated from each other by an interval of 9 years.
Years in bold contained major Indian earthquakes in the 8 months ending August 30 of those years in the table. 
Source of Earthquake Data
: Earthquake History of India

 

 

Table          THE 9/56 YEAR CYCLE & INDIAN EARTHQUAKES
Year ended August 30

Sq
53

Sq
06

Sq
15

Sq
24

Sq
33

Sq
42

Sq
51

Sq
04

Sq
13

Sq
22

Sq
31

Sq
40

Sq
49

Sq
02

 

1856

1865

1874

1858

1867

1876

1885
0530

1894

1903

1912

1921

1930
0702

1869
0110

1878

1887

1896

1905
0404

1914

1923

1932

1941
0626

1950
0815

1959

1968 671210

1977

1986

1925

1934
0115

1943

1952

1961

1970

1979

1988
0806
0821

1997
0522

2006
051008

2015

 

 

1981

1990

1999
0329

2008

2017

 

 

 

 

 

 

 

 

The 56 year sequences in the table are separated from each other by an interval of 9 years.
Years in bold contained major Indian earthquakes in the year ended August 30 of those years in the table. 
Source of Earthquake Data
: Earthquake History of India


Appendix 1           EARTHQUAKE HISTORY OF INDIA

DATE

LOCATION

MAG

TOTAL DEATH

2004 DEC 26

OFF WEST COAST OF SUMATRA

9.3

2,25,000*

1897 JUN 12

SHILLONG PLATEAU

8.7

NA

1950 AUG 15

ARUNACHAL PRADESH-CHINA BORDER

8.5

NA

1934 JAN 15

BIHAR-NEPAL BORDER

8.3

10,700

1941 JUN 26

ANDAMAN ISLANDS

8.1

NA

1819 JUN 16

KUTCH,GUJARAT

8

NA

1905 APR 04

KANGRA, H.P

8

19,000

2001 JAN 26

BHUJ , GUJARAT

7.7

21,000

1918 JUL 08

SRIMANGAL, ASSAM

7.6

NA

2005 OCT 08

PAKISTAN

7.6

85000*

1869 JAN 10

NEAR CACHAR, ASSAM

7.5

NA

1943 OCT 23

ASSAM

7.2

NA

1930 JUL 02

DHUBRI, ASSAM

7.1

NA

1885 MAY 30

SOPOR, J&K

7

NA

1956 JUL 21

ANJAR, GUJARAT

7

NA

1999 MAR 29

CHAMOLI DIST, UP

6.8

NA

1988 AUG 06

MANIPUR-MYANMAR BORDER

6.6

1,000

1991 OCT 20

UTTARKASHI, UP HILLS

6.6

2,000

1967 DEC 10

KOYNA, MAHARASHTRA

6.5

NA

1988 AUG 21

BIHAR-NEPAL BORDER

6.4

NA

1993 SEP 30

LATUR-OSMANABAD, MAHARASHTRA

6.3

10,000

1975 JAN 19

KINNAUR, HP

6.2

NA

1997 MAY 22

JABALPUR,MP

6

NA

Events highlighted in bold fall in the 8 months ending August 30 of those years in the 9/56 year grid as presented in Table A. 
Source:
Earthquake History of India


Appendix 2                     THE COMPLETE 9/56 YEAR CYCLE & INDIAN EARTHQUAKES
                                                                     Year ended August 30

Sq
52

Sq
05

Sq 14

Sq
23

Sq
32

Sq
41

Sq
50

Sq 03

Sq
12

Sq
21

Sq
30

Sq 39

Sq
48

Sq 01

1819
0616

1828

1837

1846

1855

1864

1873

1821

1830

1839

1848

1857

1866

1875

1884

1893

1902

1911

1920

1929

1868

1877

1886

1895

1904

1913

1922

1931

1940

1949

1958

1967

1976

1985

1924

1933

1942

1951

1960

1969

1978

1987

1996

2005
041226

2014

2023

 

 

1980

1989

1998

2007

2016

2025

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sq
10

Sq
19

Sq
28

Sq
37

Sq
46

Sq
55

Sq
08

Sq
17

Sq
26

Sq
35

Sq
44

Sq
53

Sq
06

Sq
15

1822

1831

1824

1833

1842

1851

1860

1869
0110

1878

1887

1826

1835

1844

1853

1862

1871

1880

1889

1898

1907

1916

1925

1934
0115

1943
1013

1882

1891

1900

1909

1918
0708

1927

1936

1945

1954

1963

1972

1981

1990

1999
0329

1938

1947

1956
0721

1965

1974

1983

1992
911020

2001
0126

2010

2019

 

 

 

 

1994
930930

2003

2012

2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sq
24

Sq
33

Sq
42

Sq |
51

Sq
04

Sq
13

Sq
22

Sq
31

Sq
40

Sq
49

Sq
02

Sq
11

Sq
20

Sq
29

 

 

 

 

1827

1836

1845

1820

1829

1838

1847

1856

1865

1874

1883

1892

1901

1840

1849

1858

1867

1876

1885
0530

1894

1903

1912

1921

1930
0702

1939

1948

1957

1896

1905
0404

1914

1923

1932

1941
0626

1950
0815

1959

1968 671210

1977

1986

1995

2004

2013

1952

1961

1970

1979

1988
0806
0821

1997
0522

2006
051008

2015

 

 

 

 

 

 

2008

2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sq
38

Sq
47

Sq
56

Sq
09

Sq
18

Sq
27

Sq
36

Sq
45

Sq
54

Sq
07

Sq
16

Sq
25

Sq
34

Sq
43

 

 

1823

1832

1841

1850

1859

1825

1834

1843

1852

1861

1870

1879

1888

1897
0612

1906

1915

1854

1863

1872

1881

1890

1899

1908

1917

1926

1935

1944  
431023

1953

1962

1971

1910

1919

1928

1937

1946

1955

1964

1973

1982

1991

2000

2009

 

 

1966

1975
01019

1984

1993

2002

2011