Solar wind and IMF control of substorm onset

Details Solar wind and IMF control of substorm onset Solar wind and IMF control of substorm onset

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm31b1236w&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM31B-1236

Statistics

2164 Solar Wind Plasma, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

Few studies of solar wind control of substorm onset exist and only two have good statistics using the IMF. Those studies with solar wind statistics employ only a few 10's of events, yet it has been proposed that solar wind dynamic pressure changes may trigger substorms. While a small percentage of substorms are believed to be triggered by solar wind dynamic pressure variations and hence, solar wind control of the substorms is not surprising, a significant number of substorm events exist that appear to have either IMF triggers or no triggers at all. We will show the results of a statistical examination of solar wind control of substorm onset using propagated solar wind data. Furthermore, we will demonstrate the difference in the solar wind control of the substorm onset for triggered and non-triggered substorms. This type of study is important for both space weather predictions of substorm onset and for use in substorm modeling. Moreover, the results of this study will be of interest to the upcoming THEMIS mission.

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