Enhancement of electric and magnetic wave fields at density gradients

Reiniusson, A.; Stenberg, G.; Norqvist, P.; Eriksson, A. I.; Rönnmark, K.

We use Freja satellite data to investigate irregular small-scale density variations. The observations are made in the auroral region at about 1000-1700 km. The density variations are a few percent, and the structures are found to be spatial down to a scale length of a few ion gyroradii. Irregular density variations are often found in an environment of whistler mode/lower hybrid waves and we show that at the density gradients both the electric and magnetic wave fields are enhanced.

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Reiniusson, A. / Stenberg, G. / Norqvist, P. / et al: Enhancement of electric and magnetic wave fields at density gradients. 2006. Copernicus Publications.

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