Size and location of cusp diamagnetic cavities observed by Polar

Academic Article


  • We examine 6 years of cusp crossings by the Polar spacecraft to determine the size and solar wind dependence of cusp diamagnetic cavities (CDCs) and energetic particle events (CEPs). Both are frequently observed (about 50% of the time spent in the cusp). Neither shows a strong statistical dependence on upstream conditions beyond variations in the cusp itself. CEPs are found throughout the cusp, peaking near the magnetopause. CDCs are primarily found near local noon and close to the magnetopause, forming an extended region against the magnetopause.
  • Authors

  • Niehof, Jonathan
  • Fritz, Theodore A
  • Friedel, Reinhard HW
  • Chen, Jiasheng
  • Status

    Publication Date

  • July 1, 2010
  • Published In

    Digital Object Identifier (doi)


  • 115
  • Issue

  • A7