Pc3 pulsations during variable IMF conditions

Details Pc3 pulsations during variable IMF conditions Pc3 pulsations during variable IMF conditions

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999angeo..17..490v&link_type=abstract

Annales Geophysicae, vol. 17, Issue 4, pp.490-496

Physics

5

Scientific paper

Pc3 geomagnetic field fluctuations detected at low latitude (L'Aquila, Italy) during the passage of a high velocity solar wind stream, characterized by variable interplanetary magnetic field conditions, are analyzed. Higher frequency resonant fluctuations and lower frequency phenomena are simultaneously observed; the intermittent appearance and the variable frequency of the longer period modes can be well interpreted in terms of the variable IMF elements; moreover their polarization characteristics are consistent with an origin related to external waves propagating in antisunward direction. A comparison with simultaneous observations performed at Terra Nova Bay (Antarctica) provides additional evidence for a clear relationship between the IMF and Pc3 pulsations also at very high latitudes.

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