Statistical properties of global geomagnetic indexes as a potential forecasting tool for strong perturbations

Here we extend to global level, through the SYM-H index and for the period 1981-2003, a study recently published by our group regarding distributions of local geomagnetic measurements near the South Atlantic anomaly, for the period 1998-2003, advanced as a potential forecasting tool. We have found, once more, a correlation between distributions and the corresponding storm intensities. A step forward was the finding of a correlation between the temporal variation of distributions and the corresponding storm intensities which could also serve as a probabilistic storm forecasting method. The data was obtained at the World Data Centre for Geomagnetism, Kyoto, Japan.