Spectrum of geomagnetic activity in the period range 5−60 days: possible lunar influences
The series of daily <i>Ap</i>-indices has been subdivided into pentades (1932–1936 etc.) and spectra with fine-frequency resolution have been calculated for the indices in each of these intervals. Daily sunspot numbers have been processed in the same way. The average spectrum from al...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1998-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/16/804/1998/angeo-16-804-1998.pdf |