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A Strong Polarization Electric Field forms in Low-Conductivity Region between the Inner Edge of the Plasmasheet Precipitation and the Plasmapause. Plasmapause. Penetration Jet. Trough. Penetration Jet. DMSP F15 6 April 2000 21 MLT.

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Penetration jet

A Strong Polarization Electric Field forms in Low-Conductivity Region between the Inner Edge of the Plasmasheet Precipitation and the Plasmapause


Penetration Jet


Penetration Jet

DMSP F15 6 April 2000 21 MLT



Penetration jet

Millstone Hill

M-I Coupling:Ring Current -Plasmasphere Interactions

Penetration jet1
Penetration Jet

  • Strong Stormtime Electric Fields appear between the plasmasheet and the plasmapause

  • Statistical Studies indicate the Persistence and Predictability of the Penetration Jet

  • Storm Enhanced Density is formed where the Penetration Jet overlaps the Plasmasphere

  • Polarization Electric Fields Structure the Outer Plasmasphere forming Plasmaspheric Tails

Penetration jet

Millstone Hill Radar Scans Span Auroral and Penetration Jet Convection

20-Year Database used to Determine Statistical Features

Statistical patterns
Statistical Patterns Convection

  • Poleward-Directed Electric Field Spans the Midnight Sector Equatorward of the Auroral Two-Cell Convection Pattern

Penetration jet

PJ Overlaps Outer Plasmasphere Convection

March 31, 2001DMSP F13

Effects of penetrating electric fields
Effects of Penetrating Electric Fields Convection

  • 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

Dual effects of penetrating electric fields

Radial E Field Convection

Eastward Penetration Electric Field Uplifts Equatorial Ionosphere

Penetration JetStrips Away Outer Plasmasphere

Dual Effects of Penetrating Electric Fields

Detached Plasmaspheric Regions

Penetration Electric FieldUplifts Equatorial Ionosphere

Polarization JetStrips Away Outer Plasmasphere

Penetration jet

GPS Map of TEC July 15, 2000 22:15 UT Convection

Plumes & Blobs of Storm-Enhanced DensitySweep across Mid Latitudes

Penetration Jet

Enhancement and Poleward Expansion ofEquatorial Anomaly