Abstract
Daily variations of the geomagnetic field with amplitudes of about 50 nT at middle latitudes have been known for almost three centuries. Electrical currents in the conducting upper atmosphere are responsible for their main part. They are caused by tidal winds, which are excited by solar heating of the atmosphere as well as by gravitational forces of the moon. In addition, smaller contributions to magnetic variations arise from electrical currents in the magnetosphere, and from tidal currents in the oceans.
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© 1997 Springer-Verlag
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Olsen, N. (1997). Geomagnetic tides and related phenomena. In: Wilhelm, H., Zürn, W., Wenzel, HG. (eds) Tidal Phenomena. Lecture Notes in Earth Sciences, vol 66. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0011466
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DOI: https://doi.org/10.1007/BFb0011466
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