HR: 11:55h
AN: SH22A-07 INVITED     [Abstracts]
TI: January 2005 Long-Duration Flare Events and Fast CMEs: Summary of Sun-to-Earth Observations, Unusual Features, and New Science Questions
AU: * Kozyra, J U
EM: jukozyra@engin.umich.edu
AF: University of Michigan, Space Research Building 2455 Hayward St., Ann Arbor, MI 48109-2143 United States
AB: This paper provides an update and summary of sun-to-Earth observations, unusual features and new science questions raised by the remarkable series of long duration X-class flare events, fast CMEs, high speed streams, rarefaction regions, solar particle events, and associated magnetic activity at Earth during the 15-22 January 2005 interval. Magnetic activity included two magnetic storm intervals, the second on January 21 accompanied by a large enhancement in solar wind dynamic pressure. A partial list of interesting features, which will be updated based on presentations at this meeting, includes: unusually hard x-ray and solar particle spectra associated with the January 20 flare event, a strong ground-level event in neutron monitors on January 20, long interval of solar energetic particles in the polar cap, appearances of high-energy polar rain in association with rarefaction regions in the solar wind, large variations in ionospheric density in the polar regions, the appearance of an unusual mid/low-latitude ion/ENA aurora during the main phase of the storm on January 21, enhancements in nitric oxide throughout the 6-day interval of the magnetic storm events from January 17-22. These observations raise interesting science questions, again to be updated based on meeting presentations, including: (1) challenges to the shock-acceleration model by the timing between CME arrival and solar energetic particle variations, (2) differences in geospace response to solar wind void intervals during the current period of magnetic activity compared to the well-studied magnetically-quiet 11 May 1999 solar wind void interval, (3) role of dynamic pressure in producing low-latitude ENA/ion auroras, (4) the relative roles of auroral precipitation, solar energetic particles and high-energy polar rain in enhancing nitric oxide in the lower thermosphere, mesosphere and stratosphere during these events
DE: 2788 Magnetic storms and substorms (7954)
DE: 7513 Coronal mass ejections (2101)
DE: 7514 Energetic particles (2114)
DE: 7519 Flares
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005