Attenuation of plasmaspheric hiss associated with the enhanced magnetospheric electric field

Abstract. We report an attenuation of hiss wave intensity in the duskside outer plasmasphere response to enhanced convection and a substorm based on Van Allen Probe observations. Using test particle codes, we simulate dynamics energetic electron fluxes realistic magnetospheric electric field model driven by solar wind subauroral polarization stream. suggest that causes outward sunward motion electrons, corresponding decrease duskside, leading subsequent intensity. The results indicate can significantly change distributions, which provide free energy for amplification. This new finding is critical understanding generation plasmaspheric its activity.