Physics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90..386s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Jan. 1, 1985, p. 386-392.
Physics
34
Auroral Electrojets, Geomagnetic Micropulsations, Ionospheric Conductivity, Convection Currents, Field Aligned Currents, Hall Effect, Magnetohydrodynamic Waves, Picosecond Pulses, Polarization (Waves)
Scientific paper
Some simple theoretical considerations are discussed which are relevant to the origin of Pi 2 geomagnetic pulsations observed on the ground with the onset of geomagnetic activity. Using a basic model, the process by which subsidiary current flows are created by auroral ionospheric conductivity enhancements in the electrojet regions is examined. These current flows, which include field-aligned currents, are associated with reflected shear Alfven waves localized to the field lines which thread ionospheric conductivity gradients. Thus the ionosphere can create distinct latitudinal structure in the signal. The origin of the observed polarization pattern and predominantly westward phase propagation of Pi 2 pulsations is discussed in the light of theoretical results. It is concluded that a superposition of two travelling waves of differing amplitude is required to produce these characteristics.
Hughes Jeffrey W.
Southwood David J.
No associations
LandOfFree
Concerning the structure of Pi 2 pulsations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Concerning the structure of Pi 2 pulsations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concerning the structure of Pi 2 pulsations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-926936