Search Publications

Intense Current Structures Observed at Electron Kinetic Scales in the Near-Earth Magnetotail During Dipolarization and Substorm Current Wedge Formation

Lavraud, B.; Malykhin, A. Yu.; Grigorenko, E. E. +4 more

We use data from the 2013-2014 Cluster Inner Magnetosphere Campaign, with its uniquely small spacecraft separations (less than or equal to electron inertia length, <fi>λ</fi>_e), to study multiscale magnetic structures in 14 substorm-related prolonged dipolarizations in the near-Earth magnetotail. Three time scales of dipolar…

Electron Distributions in Kinetic Scale Field Line Resonances: A Comparison of Simulations and Observations

Hull, A. J.; Chaston, C. C.; Johnson, J. R. +1 more

Observations in kinetic scale field line resonances, or eigenmodes of the geomagnetic field, reveal highly field-aligned plateaued electron distributions. By combining observations from the Van Allen Probes and Cluster spacecraft with a hybrid kinetic gyrofluid simulation we show how these distributions arise from the nonlocal self-consistent inte…

Ion Acceleration by Flux Transfer Events in the Terrestrial Magnetosheath

Vainio, R.; Palmroth, M.; Turc, L. +6 more

We report ion acceleration by flux transfer events in the terrestrial magnetosheath in a global two-dimensional hybrid-Vlasov polar plane simulation of Earth's solar wind interaction. In the model we find that propagating flux transfer events created in magnetic reconnection at the dayside magnetopause drive fast-mode bow waves in the magnetosheat…

The Oxygen Ion Circulation in The Outer Terrestrial Magnetosphere and Its Dependence on Geomagnetic Activity

Nilsson, H.; Slapak, R.

We have quantified the O⁺ transports in the plasma sheet and lobes (-20 < X_GSM<-10R_E) and their dependencies on geomagnetic activity, Kp, using Cluster data. We found that they have similar behavior as the polar region O⁺ outflow as well as the O⁺ fluxes in the plasma mantle and high-lat…