Solar Flare Acceleration of Solar Wind: Influence of Active Region Magnetic Field

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Science  26 Jun 1981:
Vol. 212, Issue 4502, pp. 1501-1502
DOI: 10.1126/science.212.4502.1501


The direction of the photospheric magnetic field at the site of a solar flare is a good predictor of whether the flare will accelerate solar wind plasma. If the field has a southward component, high-speed solar wind plasma is usually observed near the earth about 4 days later. If the field has a northward component, such high-speed solar wind is almost never observed. Southward-field flares may then be expected to have much larger terrestrial effects than northward flares.