Lunar modulation on the occurrence frequency of the afternoon counter-electrojet events at Trivandrum |
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| Authors: | NS Sastri BR Arora |
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| Institution: | Indian Institute of Geomagnetism, Colaba, Bombay 400 005, India |
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| Abstract: | Distribution, over the lunar age, of the frequency of occurrence of the afternoon counter-electrojet events at Trivandrum during the period 1959–1978 is examined in each of the calendar months. A strong lunar modulation on the occurrence frequency is seen in January; this may be related to the global enhancement of the lunar tide during January. The modulation is also prominent in April, although 62% of the events in that month occur irrespective of the lunar age. The occurrence frequency at Trivandrum appears to be least influenced by the Moon in the northern summer months. |
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