[1] We studied the transmission of upstream waves to polar latitudes through the Earth's magnetotail lobes, statistically examining the correspondence between magnetospheric waves detected by Cluster and geomagnetic fluctuations at Dome C, in Antarctica (λ~88.84°S). The analysis was restricted to time intervals when Cluster was in the southern magnetotail lobe, on field lines with footprints close to Dome C. During the day, the coherence between geomagnetic and magnetospheric signals is significantly high, indicating a common source, in the frequency range 20-35 mHz, at typical upstream wave frequencies, and particularly in the early morning sector, when a higher occurrence of upstream waves is typically expected, and Dome C is relatively unaffected by dayside phenomena. The highest coherence is observed between fluctuations in the horizontal components on the ground and transversal components of the magnetospheric field.