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9/56 YEAR CYCLE:
MARYLAND EARTHQUAKES- 1870-2005
Moon
- Sun Finance
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Appendix for the paper 9/56
year Cycle: Earthquakes & Volcanoes.
The Maryland
Geological Survey listed some 33 Maryland earthquakes that have occurred since
1870 (mag =>2.0) (see Table A). Of this figure,
an amazing 22 occurred in the year ended November 20 of those 9/56 years in
Table B this appendix (extremely significant: p < 10-6). However,
5 events happened in 1993
only, so there may be a distortion to any data containing this
year. Thus an appraisal was also made of the interval 1875-1990, a period in which occurred a total of 23 earthquakes. Some 16
events took place in the 11 months ended November 30 of those years in
Table B. Such a finding was still extremely significant (p < 10-6).
Curiously 8 quakes occurred in only two 56 year sequences, where as 1.2
could have been expected by chance.
|
1874
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+9
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1883
**
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1930
**
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+9
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1939
***
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1986
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+9
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1995
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Table A
MARYLAND HISTORICAL EARTHQUAKES: 1870-2002
Mag =>2.0
|
| Year
Mo. Day |
Location
|
Int |
Mag |
| 1876
01 30 |
Annapolis |
... |
... |
| 1876
04 10 |
Prince
Frederick |
III |
2.7 |
| 1877
09 01 |
Brandywine |
III |
2.7 |
| 1881
01 04 |
Westminster |
IV-V |
3.1 |
| 1883
03 11 |
Fallston |
IV |
3.1-3.3 |
| 1883
03 12 |
Fallston |
III |
2.7-
2.9 |
| 1902
03 10 |
Union
Bridge |
III |
2.7 |
| 1902
03 11 |
Union
Bridge |
III |
2.7 |
| 1903
01 01 |
Union
Bridge |
III |
2.7 |
| 1903
01 01 |
Union
Bridge |
II |
2.4 |
| 1906
10 13 |
Catonsville |
III |
2.7 |
| 1910
01 24 |
Westminster |
II |
2.4 |
| 1910
04 24 |
Catonsville |
III |
2.7 |
| 1928
10 15 |
Ocean
City |
IV |
2.7-3.3 |
| 1930
11 01 |
Round
Bay - Severna Park |
IV |
3.1-
3.3 |
| 1930
11 01 |
Round
Bay - Severna Park |
III |
2.7 |
| 1939
06 22 |
Phoenix |
III |
2.7 |
| 1939
11 18 |
Phoenix |
IV |
3.1 |
| 1939
11 26 |
Phoenix |
V |
3.5-
3.7 |
| 1962
09 07 |
Hancock |
IV |
3.3 |
| 1978
04 26 |
Hancock |
... |
3.1 |
| 1986
05 23 |
Accoceek
- Piscataway |
... |
2.5 |
| 1990
01 13 |
Randallstown
(V), Eldersburg (IV), Ellicott City (IV), Granite (IV), Owings Mills (III) |
V |
2.6
2.5 |
| 1991
09 28 |
Granite
- Randallstown |
III |
2.4 |
| 1993
03 10 |
Columbia
(IV) - Ellicott City (II) - Fulton (II) |
II-IV |
2.5 |
| 1993
03 12 |
Columbia
- Allview Estates |
II-III |
2.0 |
| 1993
03 15 |
Columbia
- Allview Estates - Laurel |
III-V |
2.7 |
| 1993
07 12 |
Columbia
- Allview Estates |
III-IV |
2.1 |
| 1993
10 28 |
Ilchester
- Ellicott City |
IV |
2.1 |
| 1994
10 28 |
Glen
Burnie - Pasadena -Gambrills -Millersville |
IV |
2.7 |
| 1996
08 02 |
Perryville |
II-III |
2.2 |
| 1996
10 17 |
Rising
Sun (epicenter may be in Pennsylvania) |
IV |
2.2-2.3 |
| 1996
12 22 |
Columbia
- Allview Estates |
III |
2.0-2.3 |
Years in bold contain
in major Maryland earthquakes in the 12 months ended November 30
of those years in Table B this appendix.
Source: Maryland
Geological Survey. |
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Table B
9/56 YEAR CYCLE: MARYLAND EARTHQUAKES |
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|
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|
1872 |
1881 |
| |
|
|
|
|
|
1874
|
1883
**
|
1892
|
1901
|
1910
** |
1919 |
1928 |
1937 |
1876
**
|
1885
|
1894
|
1903
**
|
1912
|
1921
|
1930
**
|
1939
***
|
1948
|
1957
|
1966 |
1975 |
1984 |
1993
***** |
|
1932
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1941
|
1950
|
1959
|
1968
|
1977
|
1986
|
1995
|
2004
|
|
|
|
|
|
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1988
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1997
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2006
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The
56 year sequences in the table are separated by an interval of 9
years.
Years in bold contain
in major Maryland earthquakes (mag =>2.0) in the 12 months ended November 30
of those years in the table.
Source of Raw Data: Maryland
Geological Survey |
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