Abstract Knowledge of the ion composition in the near-Earth's magnetosphere and plasma
sheet is essential for the understanding of magnetospheric processes and instabilities. The …

This paper reviews our current understanding of auroral features that appear poleward of
the main auroral oval within the polar cap, especially those that are known as Sun-aligned …

This paper reviews the state of knowledge concerning the source of magnetospheric plasma
at Earth. Source of plasma, its acceleration and transport throughout the system, its …

A distinct class of aurora, called transpolar auroral arc (TPA)(in some cases called “theta”
aurora), appears in the extremely high-latitude ionosphere of the Earth when interplanetary …

Cluster was the first mission in the terrestrial magnetosphere to involve four spacecraft in a
tetrahedral configuration, providing three‐dimensional measurements of the space plasma …

The manner in which the Earth's magnetosphere responds to the solar wind is highly
dependent upon the orientation of the interplanetary magnetic field (IMF), particularly the …

This study investigates the interhemispheric nature of polar cap auroras via ultraviolet
imaging, combined with particle data, to determine whether they occur on open or closed …

We report two events of high‐latitude dayside aurora (HiLDA), a large‐scale aurora in the
dayside polar cap, observed by the Defense Meteorological Satellite Program (DMSP) …

Recently, Cluster observations have revealed the presence of new regions of solar wind
plasma entry at the high‐latitude magnetospheric lobes tailward of the cusp region, mostly …

On 1 April 2004 the GUVI imager onboard the TIMED spacecraft spots an isolated and
elongated polar cap arc. About 20 min later, the Cluster satellites detect an isolated …