A homogeneous aa index: 2. Hemispheric asymmetries and the equinoctial variation | Journal of Space Weather and Space Climate

Open Access

Fig. 8.

The points show derived values of the best-fit coefficients A (black dots) and B (mauve squares) for the 8 aa′ bins as a function of the mean aa′ value for that bin. The black and mauve lines are the fits to these points given by equations (4) and (5), respectively.

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