Search Publications
On the origin of falling-tone chorus elements in Earth's inner magnetosphere
Krasnoselskikh, V.; Le Contel, O.; Angelopoulos, V. +6 more
Generation of extremely/very low frequency (ELF/VLF) chorus waves in Earth's inner magnetosphere has received increased attention recently because of their significance for radiation belt dynamics. Though past theoretical and numerical models have demonstrated how rising-tone chorus elements are produced, falling-tone chorus element generation has…
Radiation in the neighbourhood of a double layer
Berthomier, M.; Pickett, J.; Pottelette, R.
In the auroral kilometric radiation (AKR) source region, acceleration layers narrow in altitude and associated with parallel field-aligned potential drops of several kV can be identified by using both particles and wave-field high time-resolution measurements from the Fast Auroral SnapshoT explorer spacecraft (FAST). These so-called double layers …
Evidence of transient reconnection in the outflow jet of primary reconnection site
Fazakerley, A. N.; Nakamura, R.; Baumjohann, W. +4 more
The precise mechanism for the formation of magnetic islands in the magnetotail and the subsequent evolution are still controversial. New investigations have provided the first observational evidence of secondary reconnection in the earthward outflow jet of primary reconnection in the magnetotail. The secondary reconnection takes place 38 c/ωp…
Ion drift simulation of sudden appearance of sub-keV structured ions in the inner magnetosphere
Yamauchi, M.; Dandouras, I.; Nilsson, H. +1 more
Energy-latitude dispersed structured sub-keV ions in the inner magnetosphere often show significant development or intensification (by more than factor of 3) within 1-2 h near noon or afternoon where the azimuthal ion drift velocity at the sub-keV range is expected to be near zero. To examine whether such sudden appearances in the dayside can be e…
Aspects of magnetosphere-ionosphere coupling in sawtooth substorms: a case study
Farrugia, C. J.; Sandholt, P. E.
In a case study we report on repetitive substorm activity during storm time which was excited during Earth passage of an interplanetary coronal mass ejection (ICME) on 18 August 2003. Applying a combination of magnetosphere and ground observations during a favourable multi-spacecraft configuration in the plasma sheet (GOES-10 at geostationary alti…
Analysis of double-step response to an interplanetary shock in the dayside magnetosphere
Kilpua, E. K. J.; Koskinen, H. E. J.; Juusola, L. +1 more
We present an analysis of double-step magnetic field enhancement caused by interplanetary (IP) shock impacts on the Earth's magnetosphere. The structures were observed by the GOES-8, 10, 11, and 12 spacecraft in the dayside geostationary orbit, particularly during northward interplanetary magnetic field (IMF) conditions. The double-step structures…
Observation of shocks associated with CMEs in 2007
Zhang, T. L.; Balikhin, M. A.; Taktakishvili, A. +1 more
The interaction of CMEs with the solar wind can lead to the formation of interplanetary shocks. Ions accelerated at these shocks contribute to the solar energetic protons observed in the vicinity of the Earth. Recently a joint analysis of Venus Express (VEX) and STEREO data by Russell et al. (2009) have shown that the formation of strong shocks as…