Cross-Correlations between Monthly Averages of Solar-Interplanetary Indices fom 1971 to 1978

摘要

The correlations between certain indices describing various forms of solar activity, and between those indices and indices that measure interplanetary or terrestrial consequences of solar activity are described. A limited set is specified, especially with respect to terrestrial consequences. Included are sunspot number, calcium plage area index, 10.7 and 21 cm radio flux, geomagnetic aa index, average solar wind speed, and 27 day recurrence index. The indices themselves are described, and the cross-correlations are computed for various time lags, or phase differences between the two indices in order to find that lag for which the (absolute value of the) correlation maximizes. A plot is produced for cross-correlation versus phase, and a scatter plot and data overlay plot are given for the lag at which the cross-correlation maximizes.