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Solar eclipse of March 7, 1970 ：ウィキペディア英語版

Solar eclipse of March 7, 1970

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's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding 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. 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==
The March 7 eclipse slowed a radio transmission of atomic time from North Carolina to Washington, D.C.〔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〕

抄文引用元・出典: フリー百科事典『ウィキペディア（Wikipedia）』
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