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Annals of Geophysics
We used ULF geomagnetic field measurements in the Pc5 frequency range (1.7−7 mHz) at two Antarctic stations to statistically investigate the longitudinal location of the polar cusp. The two stations are located at the same geomagnetic latitude, ~80° S (just poleward of the cusp), and are separated by one hour in magnetic local time. Since at each station the Pc5 power maximizes when the station approaches the cusp, the comparison between their Pc5 power allows to estimate the longitudinaldoi:10.4401/ag-7779 fatcat:yu5lhuiqejdsdgh2uqwdjws3u4