A Statistical Study of Pulsating Aurora Using THEMIS Ground Camera Images

Details A Statistical Study of Pulsating Aurora Using THEMIS Ground Camera Images A Statistical Study of Pulsating Aurora Using THEMIS Ground Camera Images

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsm23b..01r&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SM23B-01

Statistics

2407 Auroral Ionosphere (2704), 2431 Ionosphere/Magnetosphere Interactions (2736), 2704 Auroral Phenomena (2407), 2716 Energetic Particles: Precipitating, 2736 Magnetosphere/Ionosphere Interactions (2431)

Scientific paper

Pulsating aurora is a frequently occurring phenomenon that often develops during the recovery phase of a substorm and results in widespread luminosity corresponding to a significant transfer of power from the magnetosphere to the ionosphere. Statistical studies have been performed to evaluate possible relationships between parameters such as patch size and pulsation period but no extensive (on the order of a year) statistics have been collected. The focus of this research is the development of a database of occurrences of pulsating aurora and the statistical analysis of these data to provide important information regarding occurrence rates vs. MLT and invariant latitude as well as the typical size of the pulsating region, which will act as a measure of the relative importance of pulsating aurora in terms of energy transfer to the ionosphere. A preliminary analysis of 8 substorm-related pulsating aurora events with good optical data from September through early December 2007 show the region of pulsating aurora occurring mostly post-midnight within the range of approximately 63- 68 degrees magnetic latitude and spanning 1-2 hours in magnetic local time.

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