Geoeffectiveness of interplanetary shocks, magnetic clouds, sector boundary crossings and their combined occurrence

Details Geoeffectiveness of interplanetary shocks, magnetic clouds, sector boundary crossings and their combined occurrence Geoeffectiveness of interplanetary shocks, magnetic clouds, sector boundary crossings and their combined occurrence

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3109808e&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 9, CiteID L09808

Physics

28

Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Interplanetary Shocks, Interplanetary Physics: Solar Wind Plasma, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Storms And Substorms

Scientific paper

The aim of this work is to study the geoeffectiveness of interplanetary shock waves, magnetic clouds, heliospheric current sheet sector boundary crossings, and the combinations of these interplanetary structures. Both single and compound structures have their geoeffectiveness evaluated, considering the percentage of moderate and intense magnetic storms (Dst <= -50 nT) that followed each event. With this criteria, it was found that, on average, around 57% of the interplanetary shocks, 26% of the sector boundary crossings, 77% of the magnetic clouds, 80% of magnetic clouds at sector boundaries, 60% of interplanetary shocks at sector boundaries, 81% of magnetic clouds driving shocks, 83% of magnetic clouds compressed by high speed streams, and 100% of magnetic clouds driving shocks and located at sector boundaries are geoeffective. Thus, compound interplanetary magnetic structures were found to be more geoeffective than single interplanetary magnetic structures.

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