Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8495s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8495-8518. Research supported by NSERC.
Physics
142
Earth Magnetosphere, Magnetic Resonance, Magnetic Storms, Night, Plasma Resonance, Auroras, Field Aligned Currents, Magnetohydrodynamic Waves
Scientific paper
The paper examines the features of the field line resonances (FLRs), which are often observed near local midnight and in the very early morning by the Johns Hopkins University/Applied Physics Laboratory HF radar and the instruments of the Canadian Auroral Network. Using the FLRs to determine the position of the initiation of the substorm intensification in the nightside magnetosphere, it is shown that at least some substorm intensifications may start relatively close to the earth, at about 7 to 10 R(E) on dipolelike lines. The role of FLRs in the initiation of the expansive phase is investigated. It is found that the onset can start within the region of the resonances and that the FLRs may play a role in the modulation of the precipitation of auroral electrons and in the formation of substorm field-aligned currents.
Creutzberg F.
Greenwald Ray A.
Hughes Terrence J.
Ruohoniemi Michael J.
Samson John C.
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