B. Aparicio

TL;DR: In this article, a detailed analysis of an isolated dispersionless substorm is performed on the basis of field and particle data collected in situ by the geostationary satellite GEOS 2 and of data from ground-based instruments installed close to the GEOS2 magnetic footprint.

TL;DR: In this article, a large part of the electron precipitation during a substorm on July 3, 1979, was accompanied by VLF waves at whistler frequencies and had a temporal structure grossly similar to the intensity variations of the equatorial electron fluxes.

TL;DR: A detailed analysis of the electric and magnetic components, simultaneously detected on board the ESA GEOS-2 spacecraft, permits identification of three different waves: (i) Quasi Electrostatic waves (QES) and (ii) magnetosonic waves, both of which exhibit a predominant component parallel to the DC magnetic field at frequencies above the proton gyrofrequency f H + and (iii) transverse shear Alfven waves propagating azimuthally at frequencies below f H+ as discussed by the authors.

TL;DR: In this article, the global electric field establishes boundaries that particles of given adiabatic invariants cannot penetrate and a change or reversal of the electric field moves these boundaries so as to permit their observation at GEOS 2, which is consistent with the idea that these particles are injected in the midnight sector and drift toward noon.