Solar and Lunar Daily Geomagnetic Variations at Lunping from 1966 to 1989

Abstract

Mean hourly values of geomagnetic declination, horizontal intensity and vertical intensity observed at Lunping have been analysed by use of the Chapman-Miller method in order to determine their their solar and luni-solar diurnal components. Data obtained from 1966 to 1989 have been used. First the data are analysed as a whole, then reanalysed after subdivision according to season, month and solar activity. The lunar semi-diurnal variations are separated into parts of ionospheric and oceanic dynamo origin. The results are tabulated, discussed and compared with those of other observatories.

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