Observation of low frequency electromagnetic activity at 1000 km altitude [PDF]
Annales Geophysicae, 2001 We present a statistical study of low frequency fluctuations of electric and magnetic fields, commonly interpreted as Alfvénic activity. The data base consists of six months of electric and magnetic field measurements by the Astrid-2 microsatellite.
N. Ivchenko, G. Marklund
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Antarctic Record, 1972 The essence of the auroral-electrojet is an association with the rapid motion of the aurora. We estimate the three-dimensional current distribution based upon the change of 4278 Å line aurora observed at Syowa Station by HIRASAWA (1971).
Takesi IIJIMA
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Auroral E-region electron density height profile modificationby electric field driven vertical plasma transport:some evidence in EISCAT CP-1 data statistics [PDF]
Annales Geophysicae, 2004 A model developed several years ago by Huuskonen et al. (1984) predicted that vertical transport of ions in the nocturnal auroral E-region ionosphere can shift the electron density profiles in altitude during times of sufficiently large electric
T. Bösinger +3 more
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VHF coherent radar signals from the E region ionosphere and the relationship to electron drift velocity and ion acoustic velocity [PDF]
, 2002 The Scandinavian Twin Auroral Radar Experiment (STARE) coherent radar system measures the Doppler shifts caused by ∼1 m plasma waves in the high-latitude E region ionosphere.
Nielsen, E. +5 more
core +1 more source
Quantification of magnetosphere–ionosphere coupling timescales using mutual information: response of terrestrial radio emissions and ionospheric–magnetospheric currents [PDF]
Nonlinear Processes in GeophysicsAuroral kilometric radiation (AKR) is a terrestrial radio emission excited by the same accelerated electrons which excite auroral emissions. Although it is well correlated with auroral and geomagnetic activity, the coupling timescales between AKR and ...
A. R. Fogg +11 more
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On the occurrence and motion of decametre-scale irregularities in the sub-auroral, auroral, and polar cap ionosphere [PDF]
Annales Geophysicae, 2003 The statistical occurrence of decametre-scale ionospheric irregularities, average line-of-sight (LOS) Doppler velocity, and Doppler spectral width in the sub-auroral, auroral, and polar cap ionosphere ( - 57°L to - 88°L) has been investigated ...
M. L. Parkinson +7 more
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Geophysical Monograph Series, Page i-xiv., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
wiley +1 more source
Interhemispheric asymmetries in the occurrence of magnetically conjugate sub-auroral polarisation streams [PDF]
, 2005 Earthward injections of energetic ions and electrons mark the onset of magnetospheric substorms. In the inner magnetosphere (L∼4), the energetic ions drift westward and the electrons eastward, thereby enhancing the equatorial ring current.
Parkinson, M.L. +26 more
core +1 more source
Transpolar arc evolution and associated potential patterns [PDF]
Annales Geophysicae, 2004 We present two event studies encompassing detailed relationships between plasma convection, field-aligned current, auroral emission, and particle precipitation boundaries.
J. A. Cumnock +2 more
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Meridional motions of the afternoon radar aurora, auroral electrojets, and absorption patches under variable IMF conditions [PDF]
, 2004 International audienceThe meridional motions of the CUTLASS HF and STARE VHF coherent echoes, IMAGE equivalent electrojet currents, and IRIS absorption patches during the postnoon/early-evening event of 14 February 2000 are presented.
Uspensky, M. V. +7 more
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