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Magnetospheric substorm models: Comparison with neutral sheet magnetic field observations

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Four models for geomagnetic substorms, a quiet tail model, and models incorporating structural effects of the tail are examined for consistency with magnetic-field data during satellite crossings of the tail neutral sheet/plasma sheet. For this data the tearing mode instability model is always consistent, and inward moving distant neutral line is sometimes consistent, quasi-steady reconnection with slow shock and intermediate wave structure and locally quiet tail rarely consistent, and an outward propagating rarefaction wave is never consistent with the magnetic observations. In several cases structural effects of the tail are consistent with key features of the magnetic signatures.

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Speiser, T.W., Schindler, K. Magnetospheric substorm models: Comparison with neutral sheet magnetic field observations. Astrophys Space Sci 77, 443–453 (1981). https://doi.org/10.1007/BF00649470

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  • Structural Effect
  • Rarefaction Wave
  • Mode Instability
  • Wave Structure
  • Magnetic Signature