The Relationship Between Solar Flares and Solar Sector Boundaries.
STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
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A superposed epoch analysis of 1964-1970 solar flares shows a marked increase in flare occurrence within a day of - solar sector boundaries as well as a local minimum in flare occurrence near - sector boundaries. This preference for - boundaries is more noticeable for northern hemisphere flares, where these polarities match the Hale polarity law, but is not reversed in the south. Plage regions do not show such a preference.