Physics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9212221a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Nov. 1, 1987, p. 12221-12232.
Physics
13
Auroral Electrojets, Geomagnetic Pulsations, Magnetic Variations, Particle Precipitation, Polar Regions, Magnetic Storms, Northern Hemisphere
Scientific paper
Magnetic pulsation data obtained from the high-latitude northern and southern sites are analyzed. It is found that dayside large-amplitude irregular pulsations (Pi) are related to auroral particle precipitation. High-latitude nightside magnetic pulsations are bursts of Pi (PiB) with an average duration of 15 min. The auroral forms related to the high-latitude PiB can be identified as the poleward discrete arc, generally having a large longitudinal extent. There is no seasonal dependence in the statistical occurrence of nighttime PiB nor its simultaneity in opposite hemispheres. The actual several-minute time difference in opposite hemisphere onsets of PiB is probably due to the westward/poleward motion of the longitudinally extended aurora.
Arnoldy Roger L.
Cahill Laurence J. Jr.
Engebretson Mark J.
Rajashekar Rakshith
Rosenberg T. J.
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