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  • 1
    Electronic Resource
    Electronic Resource
    Strong atmospheric disturbances as a possible origin of inner zone particle diffusion (1999)
    Springer
    Annales geophysicae 17 (1999), S. 526-532 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (active experiments; ionosphere-atmosphere interactions; particle acceleration)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A new mechanism of the atmosphere-magnetosphere interaction, which might be called “acoustic-magnetospheric cyclotron accelerator”, is proposed. The idea of this mechanism stems from the fact that strong acoustical perturbations in the ionosphere (e.g., due to earthquakes, thunderstorms, etc.) may generate magnetic disturbances in the magnetosphere. Then, the latter will induce local resonant acceleration and subsequent inward diffusion of trapped particles. This idea may be fruitful in the interpretation of some occasional increases in inner zone particle fluxes which do not correlate with the solar or magnetospheric activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-999-0526-2
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    Paper (German National Licenses)
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  • 2
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    Irregularities at Sub-Auroral, Middle, and Low Latitudes in the Topside Ionosphere Observed During Geomagnetic Storms with the DEMETER and DMSP Satellites (2008)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: Detailed observations of the plasma structure and irregularities that characterize the topside ionosphere at sub-auroral, middle, and low-latitudes are presented that were gathered with probes on the DEMETER and DMSP satellites during geomagnetic storms. Data from successive orbits reveal how the density structure and irregularities evolve with changes in the Dst. The observations reveal that precisely during the main phase of severe geomagnetic storms, increased ambient plasma densities and broad regions of irregularities are observed at 700 km, initially at storm commencement near the magnetic equator and then extending to mid- and sub-auroral latitudes within the approximately 8 hour period corresponding to the negative Dst excursions. Furthermore, intense, broadband electric and magnetic field irregularities are often observed at sub-auroral latitudes and are typically associated with the trough region and its poleward plasma density gradient. The observations provide a general framework showing how low, mid, and sub-auroral latitude plasma density structuring and associated irregularities respond to geomagnetic storms.
    Keywords: Space Sciences (General)
    Type: 12th International Symposium on Equatorial Aeronomy (ISEA); May 18, 2008 - May 24, 2008; Crete; Greece
    Format: text
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    NASA TECHNICAL REPORTS
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