scholarly journals The Effects of Solar Wind Dynamic Pressure Changes on the Substorm Auroras and Energetic Electron Injections on 24 August 2005

2018 ◽  
Vol 123 (1) ◽  
pp. 385-399 ◽  
Author(s):  
L. Y. Li ◽  
Z. Q. Wang
Keyword(s):  
Solar Wind ◽  
Dynamic Pressure ◽  
Energetic Electron ◽  
Solar Wind Dynamic Pressure ◽  
Pressure Changes

scholarly journals Multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an intense solar wind dynamic pressure pulse

2016 ◽  
Vol 34 (5) ◽  
pp. 493-509 ◽  
Author(s):  
Zheng Xiang ◽  
Binbin Ni ◽  
Chen Zhou ◽  
Zhengyang Zou ◽  
Xudong Gu ◽  
...  
Keyword(s):  
Solar Wind ◽  
Radiation Belt ◽  
Pressure Pulse ◽  
Electron Flux ◽  
Dynamic Pressure ◽  
Energetic Electron ◽  
Solar Wind Dynamic Pressure ◽  
Angle Scattering ◽  
Radiation Belt Electrons ◽  
Atmospheric Loss

<p><strong>Abstract.</strong> Radiation belt electron flux dropouts are a kind of drastic variation in the Earth's magnetosphere, understanding of which is of both scientific and societal importance. Using electron flux data from a group of 14 satellites, we report multi-satellite simultaneous observations of magnetopause and atmospheric losses of radiation belt electrons during an event of intense solar wind dynamic pressure pulse. When the pulse occurred, magnetopause and atmospheric loss could take effect concurrently contributing to the electron flux dropout. Losses through the magnetopause were observed to be efficient and significant at <i>L</i> ≳ 5, owing to the magnetopause intrusion into <i>L</i> ∼ 6 and outward radial diffusion associated with sharp negative gradient in electron phase space density. Losses to the atmosphere were directly identified from the precipitating electron flux observations, for which pitch angle scattering by plasma waves could be mainly responsible. While the convection and substorm injections strongly enhanced the energetic electron fluxes up to hundreds of keV, they could delay other than avoid the occurrence of electron flux dropout at these energies. It is demonstrated that the pulse-time radiation belt electron flux dropout depends strongly on the specific interplanetary and magnetospheric conditions and that losses through the magnetopause and to the atmosphere and enhancements of substorm injection play an essential role in combination, which should be incorporated as a whole into future simulations for comprehending the nature of radiation belt electron flux dropouts.</p>

The effect of solar wind dynamic pressure changes on low and mid-latitude magnetic records

1992 ◽  
Vol 19 (12) ◽  
pp. 1227-1230 ◽  
Author(s):  
C. T. Russell ◽  
M. Ginskey ◽  
S. Petrinec ◽  
G. Le
Keyword(s):  
Solar Wind ◽  
Dynamic Pressure ◽  
Solar Wind Dynamic Pressure ◽  
Pressure Changes

Electron drift echoes induced by negative solar wind dynamic pressure pulses

2020 ◽  
Author(s):  
Xiaohan Ma ◽  
Qiugang Zong ◽  
Yixin Hao ◽  
Seth Claudepierre ◽  
Ying Liu
Keyword(s):  
Solar Wind ◽  
Electric Field ◽  
Relativistic Electron ◽  
Pressure Pulse ◽  
Dynamic Pressure ◽  
Energetic Electron ◽  
Interplanetary Shock ◽  
Solar Wind Dynamic Pressure ◽  
Electron Drift ◽  
Field Variation

&lt;div&gt; &lt;div&gt; &lt;div&gt; &lt;p&gt;Sudden dropouts of the relativistic electron fluxes with drift echoes are closely related to a&amp;#160;positive solar wind dynamic pressure pulse, such as an interplanetary shock impact on the&amp;#160;magnetosphere. In this study, we further examine how magnetospheric energetic particles&amp;#160;response to a negative solar wind dynamic pressure pulse on the 11th May 2017. During&amp;#160;this event, sudden dropouts of energetic electron fluxes with an energy of 200 keV&amp;#8764;750&amp;#160;keV and enhancements of the relativistic electron fluxes of 0.85 MeV&amp;#8764;2.7 MeV were observed simultaneously by both Van Allen Probes. The periodic electron flux dropout-recovery or enhancement-decay signatures, which are attributed to electron drift behaviors,&amp;#160;exhibited energy dependence. Based on the electron phase space density profile and the&amp;#160;induced electric field variation, we interpreted this phenomenon as the consequence of radially outward transportationss of electrons caused by the electric field impulse induced by the&amp;#160;negative dynamic pressure pulse.&lt;/p&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt;

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