AnnalesGeophysicae EISCATobservationsofplasmapatchesatsub-auroralcusplatitudes

During increased geomagnetic activity (Kp 3), Wallops is able to measure the expansion of auroral electric fields to middle latitudes and the average SuperDARN cross-polar

[ 22 ] In conclusion, we have for the first time: 1) shown an extended series of patches within the polar cap coming directly from a subauroral plasma reservoir; 2) shown that

(2) although density gradients associated with polar cap patches can be observed from the GPS TEC and ROT, scintillations were not always associated with TEC gradients (see Figures

Plasma patches en- tering the polar cap through the cusp are in reality subjected to flow shears sufficiently severe as to significantly structure the plasma by the shear

Abstract High-resolution in situ measurements from the three Swarm spacecraft, in a string-of-pearls configuration, provide new insights about the combined role of flow channel events

Polar cap flux (F pc ) with initial value 0.4GWb. Events a,b and c are snapshots represented by black vertical lines... Figure 4.5: The calculated electric field components for λ

However as solar cycle has a stronger effect on the geomagnetic activity level than season, and the depletion re- gion could be seen clearly during all levels of solar activity

If we assume that the entering high density plasma and the associated irregularities moved poleward into the polar cap along the convection streamlines, we can compare the