This paper deals with acceleration processes in the magnetotail and the processes that
enhance particle precipitation from the tail into the ionosphere through electric fields in the …

One of the longstanding questions of space science is: How does the Earth's
magnetosphere generate auroral arcs? A related question is: What form of energy is …

The spectacular visual displays from the aurora come from curtains of excited atoms and
molecules, impacted by energetic charged particles. These particles are accelerated from …

In data mining, density-based clustering, which entails classifying datapoints according to
their distributions in some space, is an essential method to extract information from large …

Auroral breakup at the onset of substorm expansion is sometimes preceded by auroral forms
known as quiet arcs and N‐S arcs. Observations have shown that both the auroral forms …

High resolution imaging within regions of auroral luminosity reveal complex, highly
structured dynamic and often vortical forms which evolve on time scales of the order of …

In 2008, coordinated radar‐optical auroral observations were organized in Northern
Scandinavia using the European Incoherent Scatter Radar (EISCAT) and the Auroral Large …

High‐latitude neutral winds often circulate in a two‐cell pattern as driven by large‐scale
auroral forcing. However, auroral forcing also occurs in various types of mesoscale forms (ie …

Observations of a quiet electrostatic auroral arc by the ALIS network on 5 March 2008 are
used to infer a two‐dimensional map of the flux of precipitating energy. Among a family of …

Introduction: During recent years magnetosheath plasma structures called “jets” are
identified in spacecraft data as localized regions in the magnetosheath where the dynamic …