Irregularity generation associated with dust cloud expansion through a background plasma along a magnetic field is investigated. Because of the dust charging process, a boundary layer is produced, separating the dusty plasma generated and the [...]
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We present a large-scale statistical study of the solar wind propagation delay between NASA’s Advanced Composition Explorer spacecraft and ESA’s Cluster 1 spacecraft. This study focuses on those periods when Cluster was within the unimpeded solar [...] We examine the characteristics of a train of ULF waves observed in the magnetosphere and at ground after the sudden impulse (SI) onset of 8 June 2000. A highly monochromatic and large-amplitude wave at f = 3.3 mHz was observed between 9:10 and 9:50 UT [...] We present a new investigation of the variability in the metallic calcium ion concentration near the mesopause region, and its relation to the electron concentration during summer and winter seasons at the Arecibo Observatory. During the summer months [...] The influence of the solar wind on the magnetosphere-ionosphere system can be described in terms of driven and unloading processes. In a driven process, the response is proportional to the input with at most a small time delay. In an unloading [...] An empirical model of storm-time behavior of the ionospheric peak height hmF2 associated with changes of peak electron density NmF2 is inferred from the topside true-height profiles provided by ISIS 1, ISIS 2, IK-19, and Cosmos-1809 satellites for the [...] We present in situ and ground-based measurements of the ratio κ of ion cyclotron angular frequency to ion-neutral momentum transfer collision frequency to investigate ionosphere-thermosphere (IT) coupling in the auroral E region. In situ observations [...] Passes through the mid-region of the magnetotail by the Cluster spacecraft from 2001 to 2007 have been examined to study the dynamics of the cross-tail current sheet. Cluster is ideally placed to study this region due to the orientation of the orbit [...] A survey of dayside 557.7 and 630.0 nm auroral emission, acquired from the all-sky imagers at the Yellow River Station in Ny-Ålesund, Svalbard, shows that the dayside auroral oval could be divided into five auroral active regions: the dawnside (Da, [...] Comparisons of multispacecraft observations and full-particle simulations are used to understand magnetotail changes during substorms and the related cross-tail current disruptions/reductions. We first show that the electric field accompanying current [...] |
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