Impulsive solar energetic ion trapping in the magnetosphere during geomagnetic storms Journal Article uri icon



  • A mechanism for prompt trapping of solar energetic particles (SEPs) in the inner magnetosphere during severe storms is numerically demonstrated. The mechanism can be understood in terms of a generalization of Störmer theory to a time dependently perturbed dipole magnetic field. Test particle Lorentz trajectories are computed in fields from a Lyon‐Feder‐Mobarry (LFM) global MHD magnetospheric model simulation of the 24 Nov 2001 storm to show energetic particles may be impulsively injected into the magnetosphere and trapped on a time scale of minutes by a sudden compression and de‐compression of the magnetosphere. It is also shown that SEPs with access to the innermost L‐shells enter through the magnetopause on the day side.

publication date

  • March 1, 2005

has restriction

  • bronze

Date in CU Experts

  • June 16, 2021 12:49 PM

Full Author List

  • Kress BT; Hudson MK; Slocum PL

author count

  • 3

Other Profiles

International Standard Serial Number (ISSN)

  • 0094-8276

Electronic International Standard Serial Number (EISSN)

  • 1944-8007

Additional Document Info


  • 32


  • 6