Abstract
Data on the auroral absorption events observed with riometers at and near the conjugate stations, Great Whale River and Byrd, are analyzed by means of correlation coefficients. The greatest correlation between conjugate regions, taking any displacement of conjugate point into account, is usually in the range 0.6-0.75; some, but not all, of the loss of correlation is attributed to a wandering of conjugate point by about 200 km. The analysis is unable to detect any loss of correlation as magnetic activity increases, although such a decrease has been reported in conjugate auroral observations by optical means. The paper points out, with examples, the difficulty of relating correlation patterns to the properties of the actual events.
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