Geoeffectiveness of solar wind interplanetary magnetic structures

Details Geoeffectiveness of solar wind interplanetary magnetic structures Geoeffectiveness of solar wind interplanetary magnetic structures

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jastp..73.1380a&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 73, Issue 11, p. 1380-1384.

Physics

1

Scientific paper

We address the geoeffectiveness of three interplanetary structures in the interplanetary space: magnetic clouds (MCs), interplanetary shocks (IPSs), and corotating interaction regions (CIRs). The geoeffectiveness is evaluated using the geomagnetic indices Kp, AE, and Dst. We find that MCs are more geoeffective than IPSs, or CIRs. The average values of magnetic indices are significantly enhanced during disturbed periods associated with MCs, IPSs and CIRs, compared to the whole interval. The highest effect is noted for MC disturbed periods.Results obtained for the three data sets are used to derive a theoretical (continuous) probability distribution function (PDF) by fitting the histograms representing the percentage of events against the intervals of magnetic index. PDFs allow estimation of the probability of a given level of geomagnetic activity to be reached after the detection, by in situ solar wind observations, of a given interplanetary structure approaching the Earth.

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