Steady Magnetospheric Covnection Events as Measured by Polar UVI

Details Steady Magnetospheric Covnection Events as Measured by Polar UVI Steady Magnetospheric Covnection Events as Measured by Polar UVI

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm23b..03d&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM23B-03

Statistics

Methodology

2704 Auroral Phenomena (2407), 2740 Magnetospheric Configuration And Dynamics, 2776 Polar Cap Phenomena, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

Periods of enhanced magnetospheric convection without substorm signatures have been called Steady Magnetospheric Convection events (SMC). We have recently started investigating SMCs under the hypothesis that during these events dayside and nightside reconnection rates will balance. When this occurs the poleward auroral boundary, as measured by Polar UVI images, should remain steady. If the boundary is steady for 3 hours or more and we see no substorm signatures, the reconnection rates are fairly well balanced and we have an SMC. .We have used this methodology to pick out SMC during all seasons. Initial results show that SMCs can occur during many levels of storm time activity but mostly happen during weaker activity (avg. Dst ~-50). Our solar wind and IMF drivers thus far concur with past research with an average IMF Bz of -5 nT. We have also found various degrees of balance between the nightside and dayside reconnection rates, in that some of our events show a slow loading of the tail, up to 8 hours, before a substorm occurs. One of our most interesting results is that not all of our SMCs start substorms. We will look at the differences in the solar wind/IMF drivers and the initial conditions of the magnetosphere that lead up the initiation of the substorm and non-substorm SMCs.

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