title: Solar flare acceleration of solar wind: influence of active region magnetic field.
abstract: 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.
authors.forename: H
authors.initials: H
authors.lastname: Lundstedt
authors.forename: J M
authors.initials: JM
authors.lastname: Wilcox
authors.forename: P H
authors.initials: PH
authors.lastname: Scherrer