Solar eclipse of March 7, 1970

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Solar eclipse of March 7, 1970
SE1970Mar07T.png
Map
Type of eclipse
Nature Total
Gamma 0.4473
Magnitude 1.0414
Maximum eclipse
Duration 3m 28s
Coordinates 18.2N 94.7W
Max. width of band 153 km
Times (UTC)
Greatest eclipse 17:38:30
References
Saros 139 (27 of 71)
Catalog # (SE5000) 9442

The total solar eclipse of March 7, 1970 was visible across all of North America and Central America. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across the surface of the Earth, while a partial solar eclipse will be visible over a region thousands of kilometres wide.

Totality was visible across southern Mexico and across the southeast coast of the United States and Canada. Greatest eclipse occurred over Mexico, with totality lasting 3 minutes and 28 seconds. Totality over the United States lasted up to 3 minutes and 10 seconds.[1] There will not be an eclipse with a greater duration of totality over the contiguous United States until the solar eclipse of April 8, 2024, a period of 54 years.

Scientific effects[edit]

The March 7 eclipse slowed a radio transmission of atomic time from North Carolina to Washington, D.C.[2]

Images[edit]

Solar1970.gif
Animation of eclipse path (3 minutes per frame)

Related eclipses[edit]

Solar eclipses of 1968-1971[edit]

Each member in a semester series of solar eclipses repeats approximately every 177 days and 4 hours (a semester) at alternating nodes of the moon's orbit.

Solar eclipse series sets from 1968-1971
Ascending node   Descending node
Saros Map Saros Map
119 SE1968Mar28P.png
March 28, 1968
Partial
124 SE1968Sep22T.png
September 22, 1968
Total
129 SE1969Mar18A.png
March 18, 1969
Annular
134 SE1969Sep11A.png
September 11, 1969
Annular
139 SE1970Mar07T.png
March 7, 1970
Total
144 SE1970Aug31A.png
August 31, 1970
Annular
149 SE1971Feb25P.png
February 25, 1971
Partial
154 SE1971Aug20P.png
August 20, 1971
Partial
A partial solar eclipse of July 22, 1971 occurs in the next lunar year set.

Saros 139[edit]

It is a part of saros series 139, repeating every 18 years, 11 days, containing 71 events. The series started with partial solar eclipse on May 17, 1501. It contains hybrid eclipses on August 11, 1627 through December 9, 1825 and total eclipses from December 21, 1843 through March 26, 2601. The series ends at member 71 as a partial eclipse on July 3, 2763. Members in the same column are one exeligmos apart and thus occur in the same geographic area.

The solar eclipse of June 13, 2132 will be the longest total solar eclipse since July 11, 1991 at 6 minutes, 55 seconds.

The longest duration of totality will be produced by member 39 at 7 minutes, 29 seconds on July 16, 2186.[3] This is the longest solar eclipse computed between 4000BC and 6000AD.[4]

Series members 24-39 occur between 1901 and 2200:

24 25 26
SE1916Feb03T.png
February 3, 1916
SE1934Feb14T.png
February 14, 1934
SE1952Feb25T.png
February 25, 1952
27 28 29
SE1970Mar07T.png
March 7, 1970
SE1988Mar18T.png
March 18, 1988
SE2006Mar29T.png
March 29, 2006
30 31 32
SE2024Apr08T.png
April 8, 2024
SE2042Apr20T.png
April 20, 2042
SE2060Apr30T.png
April 30, 2060
33 34 35
SE2078May11T.png
May 11, 2078
SE2096May22T.png
May 22, 2096
SE2114Jun03T.png
June 3, 2114
36 37 38
SE2132Jun13T.png
June 13, 2132
SE2150Jun25T.png
June 25, 2150
SE2168Jul05T.png
July 5, 2168
39
SE2186Jul16T.png
July 16, 2186

Metonic series[edit]

The metonic series repeats eclipses every 19 years (6939.69 days), lasting about 5 cycles. Eclipses occur in nearly the same calendar date. In addition the octon subseries repeats 1/5 of that or every 3.8 years (1387.94 days).

This series has 21 eclipse events between July 31, 1924 and July 31, 2000.

July 31-Aug 1 May 19-20 March 7 December 24-25 October 12
115 117 119 121 123
SE1924Jul31P.png
July 31, 1924
SE1928May19T.png
May 19, 1928
SE1932Mar07A.png
March 7, 1932
SE1935Dec25A.png
December 25, 1935
SE1939Oct12T.png
October 12, 1939
125 127 129 131 133
SE1943Aug01A.png
August 1, 1943
SE1947May20T.png
May 20, 1947
SE1951Mar07A.png
March 7, 1951
SE1954Dec25A.png
December 25, 1954
SE1958Oct12T.png
October 12, 1958
135 137 139 141 143
SE1962Jul31A.png
July 31, 1962
SE1966May20A.png
May 20, 1966
SE1970Mar07T.png
March 7, 1970
SE1973Dec24A.png
December 24, 1973
SE1977Oct12T.png
October 12, 1977
145 147 149 151 153
SE1981Jul31T.png
July 31, 1981
SE1985May19P.png
May 19, 1985
SE1989Mar07P.png
March 7, 1989
SE1992Dec24P.png
December 24, 1992
SE1996Oct12P.png
October 12, 1996
155
SE2000Jul31P.png
July 31, 2000

In popular culture[edit]

Carly Simon's December 1972 pop hit "You're So Vain" contains the lyric "Then you flew your Learjet up to Nova Scotia to see the total eclipse of the sun," and could only have been a reference to this eclipse, not the one also over Nova Scotia on July 10, 1972, because it was actually written in 1971.

Notes[edit]

  1. ^ Espenak, Fred. "TOTAL SOLAR ECLIPSE OF 1970 MAR 07". NASA Eclipse Website. Goddard Space Flight Center. Retrieved 3 June 2014. 
  2. ^ Sadeh, D. (1971), Phase variation of a very accurate radio frequency signal due to the solar eclipse, J. Geophys. Res., 76(34), 8427–8429, doi:10.1029/JA076i034p08427
  3. ^ Saros Series Catalog of Solar Eclipses NASA Eclipse Web Site
  4. ^ Ten Millennium Catalog of Long Solar Eclipses, -3999 to +6000 (4000 BCE to 6000 CE) Fred Espinak

References[edit]

Maps:

News:

Photos and observations