Spatial Development of the Dipolarization Region in the Inner Magnetosphere

Details

• Journal Title:
  Journal of Geophysical Research: Space Physics
• Personal Author:
  Ohtani, S. ; Motoba, T. ; Gkioulidou, M. ; Takahashi, K. ; Singer, H. J.
• NOAA Program & Office:
  NWS (National Weather Service) ; SWPC (Space Weather Prediction Center)
• Description:
  The present study examines dipolarization events observed by the Van Allen Probes within 5.8REfrom Earth. It is found that the probability of occurrence is signi ficantly higher in the dusk-to- midnight sector than in the midnight-to-dawn sector, and it deceases sharply earthward. A comparison withobservations made at nearby satellites shows that dipolarization signatures are often highly correlated (c.c. >0.8) within 1 hr in magnetic local time (MLT) and 1 R EinRXY, and the dipolarization region expands earthward and westward in the dusk-to-midnight sector. The westward expansion velocity is estimated at0.4 hr (in MLT) per minute, or 60 km/s, which is consistent with the previously reported result for geosynchronous dipolarization. The earthward expansion is apparently less systematic than the westward
• Keywords:
  Geophysics Space And Planetary Science Space And Planetary Science Space And Planetary Science
• Source:
  Journal of Geophysical Research: Space Physics, 123(7), 5452-5463
• DOI:
  https://doi.org/10.1029/2018ja025443
• ISSN:
  2169-9380 ; 2169-9402
• Format:
  PDF
• Publisher:
  American Geophysical Union (AGU)
• Document Type:
  Journal Article
• Rights Information:
  Other
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:e95e1d9544cf6c8239055988d4074f195df65721acbde4a8b3a9aa4ea2330d22
• Download URL:
  https://repository.library.noaa.gov/view/noaa/54257/noaa_54257_DS1.pdf
• File Type:
  [PDF - 2.00 MB ]