A comparison of EISCAT and HF Doppler observations of a ULF wave [PDF]
Annales Geophysicae, 1998 Since the middle of 1995, an HF Doppler sounder has been running almost continuously in northern Norway, with the receiver at Ramfjordmoen and the transmitter at Seljelvnes.
D. M. Wright, T. K. Yeoman, J. A. Davies
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Magnetohydrodynamic modeling of three Van Allen Probes storms in 2012 and 2013 [PDF]
Annales Geophysicae, 2015 Coronal mass ejection (CME)-shock compression of the dayside magnetopause has been observed to cause both prompt enhancement of radiation belt electron flux due to inward radial transport of electrons conserving their first adiabatic invariant and ...
J. Paral +6 more
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ULF wave occurrence statistics in a high-latitude HF Doppler sounder [PDF]
Annales Geophysicae, 1999 Ultra low frequency (ULF) wave activity in the high-latitude ionosphere has been observed by a high frequency (HF) Doppler sounder located at Tromsø, Norway (69.7°N, 19.2°E geographic coordinates).
D. M. Wright, T. K. Yeoman, T. B. Jones
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Post-noon two-minute period pulsating aurora and their relationship to the dayside convection pattern [PDF]
Annales Geophysicae, 1999 Poleward-moving auroral forms, as observed by meridian-scanning photometers, in the vicinity of the cusp region are generally assumed to be the optical signature of flux transfer events.
S. E. Milan +5 more
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Observations and modelling of the wave mode evolution of an impulse-driven 3 mHz ULF wave [PDF]
Annales Geophysicae, 2010 A combination of an HF Doppler sounder, a network of ground magnetometers, upstream solar wind monitors and a numerical model is used to examine the temporal evolution of an Ultra Low Frequency (ULF) wave.
J. D. Borderick +3 more
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Statistical Study of Electric Pc5 Pulsations in the Inner Magnetosphere Observed by Cluster
Geophysical Research LettersUltra‐low frequency (ULF) waves in the Pc5 band are essential for the transport of electrons in the radiation belt and the transport of energy from the solar wind into the magnetosphere.
Li Yan +5 more
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Polarization properties of standing shear Alfvén waves in non-axisymmetric background magnetic fields [PDF]
Annales Geophysicae, 2007 In this paper we present results concerning periods and polarizations of cold plasma ultra-low frequency (ULF) guided Alfvén waves in a non-axisymmetric geomagnetic field.
K. Kabin +4 more
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Earth and Space Science, Volume 13, Issue 6, June 2026.Abstract A local vortex‐structured aurora and a large‐scale transpolar arc (TPA) were contemporaneously observed by the Polar ultraviolet imager (UVI) during the late recovery phase of a substorm, and the interplanetary magnetic field (IMF) BY and BZ were negative and negative‐to‐positive. The TPA grew along the dawnside auroral oval from the nightside
Motoharu Nowada +4 more
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Cross‐Scale Interactions Between ULF Waves, VLF Waves, and Electrons
Geophysical Research LettersWave‐particle interactions are essential for energy transport in the magnetosphere. In this study, we investigated an event during which electrons interact simultaneously with waves in different scales, using data from the Magnetospheric Multiscale ...
Xing‐Yu Li +14 more
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Modulation of Whistler-mode Waves in the Solar Wind in the Vicinity of Earth’s Moon
The Astrophysical JournalUltra-low-frequency (ULF) waves are known to modulate high-frequency whistler-mode waves within the Earth’s magnetosphere. Periodic bursts of whistler-mode waves are excited in association with ULF perturbations of plasma density and magnetic field.
Abhinav Prasad +6 more
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