North-south asymmetry in solar, interplanetary, and geomagnetic indices
| Autor: | W. M. Abou Taleb, M. A. El-Borie, M. El-Abshehy, S. Talaat |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Geomagnetic storm
Physics Astronomy and Astrophysics Astrophysics Space weather Atmospheric sciences Solar cycle Solar wind Physics::Space Physics Coronal mass ejection Astrophysics::Solar and Stellar Astrophysics Magnetopause Astrophysics::Earth and Planetary Astrophysics Heliospheric current sheet Interplanetary magnetic field Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Astrophysics. 55:127-139 |
| ISSN: | 1573-8191 0571-7256 |
| DOI: | 10.1007/s10511-012-9221-1 |
| Popis: | Data of hourly interplanetary plasma (field magnitude, solar wind speed, and ion density), solar (sunspot number, solar radio flux), and geomagnetic indices (Kp, Ap) over the period 1970-2010, have been used to examine the asymmetry between the solar field north and south of the heliospheric current sheet (HCS). A persistent yearly north-south asymmetry of the field magnitude is clear over the considered period, and there is no magnetic solar cycle dependence. There is a weak N-S asymmetry in the averaged solar wind speed, exhibited well at times of maximum solar activities. The solar plasma is more dense north of the current sheet than south of it during the second negative solar polarity epoch (qA |
| Databáze: | OpenAIRE |
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