How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms?

Details How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms? How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms?

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa23a..02b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA23A-02

Physics

2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2778 Ring Current, 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

The 20 November, 2003 and the 24 August, 2005 geomagnetic storms were both driven by an interplantery magnetic field (IMF) down to approximately -60 nT. Although, the minimum SYM-H (or Dst)depression on ground reached about -500 nT for the 20 November, 2003 storm, but not even -200 nT for the 24 August, 2005 storm. There can be several reasons for this outstanding difference: the meaning of the SYMH index and the relative tail-current contribution; the duration of the southward IMF was relatively short (~1 h) for the 24 August, 2005 storm. Did this imply less time for substorms to inject fresh plasma (especially O+) into the ring current?; Cold and dense plasmasheet. We discuss the composition and intensity of the global ring current during these two storms, by using energetic neutral atom (ENA) data from the Medium- and High Energy Neutral Atom (MENA and HENA) imagers onboard the IMAGE satellite. While at first glance the strength of the ENA images in the 10-200 keV hydrogen and oxygen are comparable for the two storms, we investigate indications that the <10 keV hydrogen data is slightly enhanced for the 20 November, 2003 storm. We will re analyze the HENA images (H and O) in more detail to retrieve the parent ion intensity and investigate the effect of substorms.

Affiliated with

Also associated with

No associations

Rating

How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How Different are the Ring Current Compositions and Strengths of the 20 November, 2003 and the 24 August, 2005 Geomagnetic Storms? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1025704