scholarly journals Inner magnetosphere plasma characteristics in response to interplanetary shock impacts

2011 ◽  
Vol 116 (A11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chao Yue ◽  
Qiugang Zong ◽  
Yongfu Wang ◽  
I. I. Vogiatzis ◽  
Zuyin Pu ◽  
...  
Keyword(s):  
Interplanetary Shock ◽  
Inner Magnetosphere ◽  
Plasma Characteristics ◽  
Magnetosphere Plasma ◽  
Shock Impacts

Energetic particle injections in the inner magnetosphere as a response to an interplanetary shock

2003 ◽  
Vol 65 (2) ◽  
pp. 233-244 ◽  
Author(s):  
Xinlin Li ◽  
D.N. Baker ◽  
S. Elkington ◽  
M. Temerin ◽  
G.D. Reeves ◽  
...  
Keyword(s):  
Energetic Particle ◽  
Interplanetary Shock ◽  
Inner Magnetosphere

scholarly journals Analysis of double-step response to an interplanetary shock in the dayside magnetosphere

2014 ◽  
Vol 32 (10) ◽  
pp. 1293-1302 ◽  
Author(s):  
K. Andréeová ◽  
L. Juusola ◽  
E. K. J. Kilpua ◽  
H. E. J. Koskinen
Keyword(s):  
Magnetic Field ◽  
Field Enhancement ◽  
Initial Response ◽  
Interplanetary Shock ◽  
Geostationary Orbit ◽  
Step Response ◽  
Double Step ◽  
Horizontal Magnetic Field ◽  
Magnetic Field Enhancement ◽  
Shock Impacts

Abstract. We present an analysis of double-step magnetic field enhancement caused by interplanetary (IP) shock impacts on the Earth's magnetosphere. The structures were observed by the GOES-8, 10, 11, and 12 spacecraft in the dayside geostationary orbit, particularly during northward interplanetary magnetic field (IMF) conditions. The double-step structures, similar to what is observed in the ground horizontal magnetic field (H) component at low and mid latitudes, were observed preferentially on the dayside. Structures observed around 12–15 magnetic local time (MLT) displayed the steepest initial enhancement step, followed by a magnetic field strength decrease before the second enhancement step. At other dayside MLTs of the geostationary orbit, the initial response was smoother, and no decrease was observed before the second step. We suggest that this MLT asymmetry in the decrease of the total magnetic field is caused by the pushing of the plasmaspheric ions over the geostationary orbit due to the magnetospheric compression.

Differences in inner magnetospheric wave activity, outer Van Allen belt electron dynamics and atmospheric precipitation during CME sheaths and flux ropes

2020 ◽  
Author(s):  
Emilia Kilpua ◽  
Milla Kalliokoski ◽  
Liisa Juusola ◽  
Maxime Grandin ◽  
Antti Kero ◽  
...  
Keyword(s):  
Solar Wind ◽  
Large Scale ◽  
Dynamic Pressure ◽  
Atmospheric Precipitation ◽  
Plasma Waves ◽  
High Energy ◽  
Wave Activity ◽  
Effective Electron ◽  
Inner Magnetosphere ◽  
Magnetosphere Plasma

<p>Coronal mass ejection (CME) driven sheath regions are one of the key structures driving strong magnetospheric disturbances, in particular at high latitudes. Sheaths are turbulent and compressed regions that exhibit large-amplitude magnetic field variations and high and variable dynamic pressure. They thus put the magnetosphere under particularly strong solar wind forcing. We show here the results of our recent studies that have investigated the response of inner magnetosphere plasma waves, energy and L-shell resolved outer belt electron variations and precipitation of high-energy electrons to the upper atmosphere during sheath regions. The data come primarily from Van Allen Probes and ground-based riometers. Our results reveal that sheaths drive intense “wave storms” in the inner magnetosphere (ULF, EMIC, chorus, hiss). Lower-energy electron fluxes (source and seed populations) are typically enhanced due to frequent and strong substorms injecting fresh electrons, while relativistic electrons are effectively depleted at wide L-ranges due to scattering by wave-particle interactions and magnetopause shadowing playing in concert. We found that even non-geoeffective sheaths can drive significant wave activity and dramatic changes in the outer belt electron fluxes. The “complex ejecta”, however, that consist of multiple sheaths and distorted CME ejecta can lead to sustained chorus and ULF waves, and as a consequence, effective electron acceleration to high energies. We also report some distinct characteristics in the intensity and Magnetic Local Time distribution of precipitation during sheaths when compared to other large-scale solar wind driver structures. The different precipitation responses likely stem from driver specific characteristics in their ability to excite inner magnetosphere plasma waves.</p><p> </p>

scholarly journals Fast acceleration of “killer” electrons and energetic ions by interplanetary shock stimulated ULF waves in the inner magnetosphere

2011 ◽  
Vol 56 (12) ◽  
pp. 1188-1201 ◽  
Author(s):  
QiuGang Zong ◽  
YongFu Wang ◽  
ChongJing Yuan ◽  
Biao Yang ◽  
ChenRui Wang ◽  
...  
Keyword(s):  
Interplanetary Shock ◽  
Ulf Waves ◽  
Energetic Ions ◽  
Inner Magnetosphere

The Inner Magnetosphere Imager mission

1993 ◽  
Author(s):  
Les Johnson ◽  
Melody Herrmann
Keyword(s):  
Inner Magnetosphere
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