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Science 26 June 1981:
Vol. 212. no. 4502, pp. 1501 - 1502
DOI: 10.1126/science.212.4502.1501
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Articles

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

H. LUNDSTEDT 1, J. M. WILCOX 1, and P. H. SCHERRER 1

1 Institute for Plasma Research, Stanford University, Stanford, California 94305

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.

Submitted on February 17, 1981

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Science. ISSN 0036-8075 (print), 1095-9203 (online)