Relationship Between UV Auroral Events and the Magnetic Storm Main Phase Development

Details Relationship Between UV Auroral Events and the Magnetic Storm Main Phase Development Relationship Between UV Auroral Events and the Magnetic Storm Main Phase Development

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11c..05g&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM11C-05

Physics

2704 Auroral Phenomena (2407), 2788 Magnetic Storms And Substorms (7954)

Scientific paper

This paper will present results from a statistical study of auroral events and their relationship to the development of the main-phase magnetospheric storm. Using global auroral images obtained by the Polar satellite and the SYMH index we have analyzed the occurrence and properties of optical auroral events and the main phase of a total of 16 magnetic storms with good average imaging coverage throughout the development period. We find that classical Akasofu type optical substorms rarely occur during the main phase of magnetic storms and hence conclude that they are not required for the development of the ring current. We have identified 64 auroral events and found that these are randomly scattered throughout the storm main phase development. For these events the average typical development time from onset to maximum intensity is about half that of classical isolated substorms and they develop at much lower latitudes. We will present results from this study and show individual events as well as results from superposed epoch analysis of the auroral disturbances, their characteristics and their relationship to the storm main phase evolution.

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