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Title: Multiple-Satellite Observation of Magnetic Dip Event During the Substorm on 10 October 2013

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2017GL074869· OSTI ID:1415429
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [4];  [5]
  1. Harbin Institute of Technology Shenzhen Graduate School, Shenzhen (China); Univ. of Science and Technology of China, Hefei (China); Univ. of Texas at Dallas, Richardson, TX (United States)
  2. Univ. of Texas at Dallas, Richardson, TX (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Peking Univ., Beijing (China)
  5. Harbin Institute of Technology Shenzhen Graduate School, Shenzhen (China)
+ Show Author Affiliations

Here, we present a multiple-satellite observation of the magnetic dip event during the substorm on 10 October 2013. The observation illustrates the temporal and spatial evolution of the magnetic dip and gives a compelling evidence that ring current ions induce the magnetic dip by enhanced plasma beta. The dip moves with the energetic ions in a comparable drift velocity and affects the dynamics of relativistic electrons in the radiation belt. In addition, the magnetic dip provides a favorable condition for the electromagnetic ion cyclotron (EMIC) wave generation based on the linear theory analysis. The calculated proton diffusion coefficients show that the observed EMIC wave can lead to the pitch angle scattering losses of the ring current ions, which in turn partially relax the magnetic dip in the observations. This study enriches our understanding of magnetic dip evolution and demonstrates the important role of the magnetic dip for the coupling of radiation belt and ring current.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1415429
Report Number(s):
LA-UR-17-30359; TRN: US1800822
Journal Information:
Geophysical Research Letters, Vol. 44, Issue 18; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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  • MacDonald, Elizabeth A.; Blum, Lauren W.; Gary, S. Peter
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Cited By (5)

Multi‐instrument Observations of Mesoscale Enhancement of Subauroral Polarization Stream Associated With an Injection journal March 2019
Quenching of Equatorial Magnetosonic Waves by Substorm Proton Injections journal June 2019
Magnetospheric Multiscale Observation of Quasiperiodic EMIC Waves Associated With Enhanced Solar Wind Pressure journal July 2019
Propagation of EMIC Waves Inside the Plasmasphere: A Two‐Event Study journal November 2019
The Effects of Localized Thermal Pressure on Equilibrium Magnetic Fields and Particle Drifts in The Inner Magnetosphere journal July 2019

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Related Subjects

58 GEOSCIENCES
Heliospheric and Magnetospheric Physics
magnetic dip
ring current ions
radiation belt electrons
EMIC wave