P1249598115bVTOp

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Plasma Tails Ionospheric SED

• J C FosterMIT Haystack ObservatoryYosemite 2002

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Millstone Hill UHF Radar
Elevation ScansMid-LatitudeStorm Enhanced
Density
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Electron Density _at_ 500 km Altitude
Geodetic Latitude
Universal Time 18-19 March 1990
Foster, JGR, 1993
(Foster, JGR, 1993)
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March 1990Su et al., GRL 2001
March 31, 2001IMAGE EUV
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Penetration Jet
DMSP F15 6 April 2000
21 MLT
Plasmapause
Plasmasheet
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Effects of Penetrating Electric Fields

• Cross-tail electric fields energize and inject
  particles into the inner magnetosphere forming
  the disturbance Ring Current
• Penetrating electric fields uplift and perturb
  the Plasmasphere and low-latitude ionosphere
• Storm-Enhanced Density (SED) and detached plasmas
  are formed as the Penetration Jet overlaps the
  outer plasmasphere
• Injected Energetic Ions are Destabilized in
  Regions of Enhanced Plasma Density

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Dual Effects of Penetrating Electric Fields
Detached Plasmaspheric Regions
Penetration Electric FieldUplifts Equatorial
Ionosphere
Polarization JetStrips Away Outer Plasmasphere
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SED formed where PJ overlaps enhanced outer
Plasmasphere
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Variable TEC
Eglin AFB, Fla L2
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GPS Map of TEC July 15, 2000 2215 UT
Plumes Blobs of Storm-Enhanced DensitySweep
across Mid Latitudes
Penetration Jet
Enhancement and Poleward Expansion
ofEquatorial Anomaly
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GPS Map of SED Plume Mar 31, 2001
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March 31, 2001DMSP F13
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GPS and Millstone Hill Radar Maps ofStorm
Enhanced Density
1015 el m-2s-1
75 TECu
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IMAGE Plasmapause (J. Goldstein)
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SED Plume GPS and IMAGE
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Radar Storm Enhanced DensityIMAGE Plasmaspheri
c Tail
Detached plasma
SED
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Storm Enhanced Density
Polar Ionosphere View
Polar Magnetosphere View
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