Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..667g&link_type=abstract
In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 667-671 (SEE N85-24544 14-46)
Physics
Auroral Electrojets, Geomagnetic Pulsations, Magnetometers, Scandinavia, Field Aligned Currents, Ionospheric Conductivity, Magnetic Storms, Magnetohydrodynamic Waves, Resonant Frequencies
Scientific paper
Observations of Pi2 pulsations made with the closely spaced Scandinavian Magnetometer Array near the break-up region and east of it, within the eastward electrojet region, are reviewed. The association of these pulsations with the substorm current system is discussed and it is concluded that the Pi2 signals recorded near the break-up region can be understood as periodic modulation of the upward field-aligned current within the head of the westward travelling surge. Pi2 signals east of the break-up region are related to a field line resonance phenomenon, probably set up by westward traveling MHD waves originating in the primary source (substorm onset) region.
Baumjohann Wolfgang
Behrens John
Glassmeier Karl-Heintz
Lester Mark
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