Abstract
We report on the observation and analysis of a quasi periodic (QP) VLF emission and geomagnetic pulsation (GP) event, a QP/GP event, observed for several hours around local noon at high geomagnetic latitudes at the South Pole station. We believe that this is the highest latitude QP/GP event reported. The narrow‐band magnetic pulsation (f ∼ 30 mHz) suggests that at this time the dayside magnetic field lines connecting South Pole to the magnetosphere were closed. This conclusion is supported by an investigation of the interplanetary magnetic field (IMF) conditions at the time of the event and modeling of the polar cap region of the magnetosphere. The results show that the South Pole location would be expected to be inside the boundary for closed magnetic field lines. The polarizations of the observed hydromagnetic wave were primarily right‐handed throughout the interval, changing slowly to left‐handed beginning approximately 2 hours after local noon. The polarizations and the orientation of the IMF (essentially radial) suggest that the hydromagnetic energy source was upstream waves.
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