Uli Auster

TL;DR: Results demonstrate that substorms are likely initiated by tail reconnection, and are reported on simultaneous measurements in the magnetotail at multiple distances, at the time of substorm onset.

TL;DR: In this paper, a dipolarization front was detected in the central plasma sheet sequentially at X = -20.1 R E (THEMIS P1 probe), at x = -16.7 R E(P2 probe), and at X= -11.0 RE (P3/P4 pair), suggesting its earthward propagation as a coherent structure over a distance more than 10 R E at a velocity of 300 km/s.

TL;DR: Li et al. as discussed by the authors performed a global survey of whistler-mode chorus waves using magnetic field filter bank data from the THEMIS spacecraft with 5 probes in near-equatorial orbits, which confirmed earlier analyses of the strong dependence of wave amplitudes on geomagnetic activity, confinement of nightside emissions to low magnetic latitudes, and extension of dayside emissions to high latitudes.

TL;DR: Direct evidence is provided that a naturally occurring electromagnetic wave, lower-band chorus, can drive pulsating aurora, and the findings can be used to constrain magnetic field models with much higher accuracy than has previously been possible.

TL;DR: Li et al. as discussed by the authors performed a statistical survey of plasma densities and electron distributions (0.5 −100 keV) using data obtained from the Time History of Events and Macroscale Interactions During Substorms spacecraft in nearequatorial orbits from 1 July 2007 to 1 May 2009 in order to investigate optimum conditions for whistler mode chorus excitation.