Abstract
A study has been performed in an effort to detect a lunar signature in geomagnetic data. Ap-indices available for the period 1932–1972 have been used for this purpose. The data have been divided into some 500 lunar months which were superimposed in synchronism with the phase of the Moon. At or shortly after full Moon a peak appears which exceeds the average value by about 3 standard deviations. Possible explanations for the generation of geomagnetic disturbances by the Moon are given.
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Knott, K. A lunar signature in the geomagnetic ap-index. The Moon 14, 49–57 (1975). https://doi.org/10.1007/BF00562972
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DOI: https://doi.org/10.1007/BF00562972