Evidences of Magnetospheric Cavity Pi2 Waves

Geomagnetic Activity and Size of Magnetospheric Cavity

The magnetopause locations as determined by the Explorer 12 SpL charged-particle detector and the Imp I plasma experiment can be used to study the relation between the solar wind parameters and geomagnetic activity. As will be seen, no strong correlation is evident between the size of the magnetosphere, as determined from magnetopause crossings, and geomagnetic activity indexes. It is argued th...

Interaction of Energetic Ring Current Protons with Magnetospheric Hydromagnetic Waves

On the origin of high m magnetospheric waves

[1] A survey of Advanced Rio‐Imaging Experiment in Scandinavia data reveals evidence for a previously overlooked generation mechanism of high azimuthal wave number magnetospheric waves. Here we present observations of pulsating cosmic noise absorption with azimuthal wave numbers as high as 380, suggestive of precipitation modulation by magnetospheric waves. Dispersion relations of the small‐sca...

Magnetospheric cavity modes driven by solar wind dynamic pressure fluctuations

[1] We present results from Lyon-Fedder-Mobarry (LFM) global, three-dimensional magnetohydrodynamic (MHD) simulations of the solar wind-magnetosphere interaction. We use these simulations to investigate the role that solar wind dynamic pressure fluctuations play in the generation of magnetospheric ultra-low frequency (ULF) pulsations. The simulations presented in this study are driven with idea...

Magnetospheric Filter Effect for PC 3 Alfven Mode Waves

We present a ray-tracing study of the propagation of PC 3 Alfven mode waves originating at the dayside magnetopause. This study reveals interesting features of a magnetospheric filter effect for these waves. PC 3 Alfven mode waves cannot penetrate to low Earth altitudes unless the wave frequency is below approximately 30 mHz. Configurations of the dispersion curves and the refractive index show...