A search for north-south asymmetry of interplanetary magnetic field and solar plasma

Details A search for north-south asymmetry of interplanetary magnetic field and solar plasma A search for north-south asymmetry of interplanetary magnetic field and solar plasma

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994angeo..12..279s&link_type=abstract

Annales Geophysicae, vol. 12, Issue 4, pp.279-285

Physics

10

Scientific paper

An analysis of interplanetary magnetic field (IMF) and plasma data taken near 1 AU during solar activity cycle 21 reveals the following. 1. The yearly averaged spiral angle shows a solar cycle dependence. 2. The spiral angle north of the current sheet is 2.4° higher than south of it during both epochs of positive and negative polarities. 3. The included angle is 4.8° higher during the epoch of positive polarity than during the epoch of negative polarity. 4. The asymmetries in the number of away and toward IMF days are correlated with the asymmetries in solar activity. 5. The solar plasma north of the current sheet is hotter, faster and less dense than south of it during the epoch of negative polarity. 6. An asymmetry in the averaged filed magnitude is absent for solar cycle 21.

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