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Full-Text Articles in Physical Sciences and Mathematics
Entry Of Plasma Sheet Particles Into The Inner Magnetosphere Observed By Polar/Cammice, N Yu Ganushkina, T I. Pulkkinen, V A. Sergeev, M V. Kubyshkina, D N. Baker, Niescja E. Turner, M Grande, B Kellett, J F. Fennell, J L. Roeder, J A. Sauvaud, T A. Fritz
Entry Of Plasma Sheet Particles Into The Inner Magnetosphere Observed By Polar/Cammice, N Yu Ganushkina, T I. Pulkkinen, V A. Sergeev, M V. Kubyshkina, D N. Baker, Niescja E. Turner, M Grande, B Kellett, J F. Fennell, J L. Roeder, J A. Sauvaud, T A. Fritz
Physics and Astronomy Faculty Research
Statistical results are presented from Polar/CAMMICE measurements of events during which the plasma sheet ions have penetrated deeply into the inner magnetosphere. Owing to their characteristic structure in energy-time spectrograms, these events are called "intense nose events." Almost 400 observations of such structures were made during 1997. Intense nose events are shown to be more frequent in the dusk than in the dawn sector. They typically penetrate well inside L = 4, the deepest penetration having occurred around midnight and noon. The intense nose events are associated with magnetic (substorm) activity. However, even moderate activity (AE = 150-250 nT) resulted …
Evaluation Of The Tail Current Contribution To Dst, Niescja E. Turner, D N. Baker, T I. Pulkkinen, R L. Mcpherron
Evaluation Of The Tail Current Contribution To Dst, Niescja E. Turner, D N. Baker, T I. Pulkkinen, R L. Mcpherron
Physics and Astronomy Faculty Research
The Dst index is produced using low-latitude ground magnetic field measurements and frequently is used as an estimate of the energy density of the ring current carried mainly by energetic (∼10-200 keV) ions relatively close to the Earth. However, other magnetospheric current systems can cause field perturbations at the Earth's surface: for example, dayside magnetopause currents are known to contribute to the Dst index. It has also been suggested that the nightside tail current sheet can significantly affect the Dst index during high magnetic activity periods when the currents are intense and flow relatively close to the Earth. In this …