The Intense Substorm Incidence in Response to Interplanetary Shock Impacts and Influence on Energetic Electron Fluxes at Geosynchronous Orbit

2019 ◽  
Vol 124 (5) ◽  
pp. 3210-3221
Author(s):  
X.‐H. Ma ◽  
Q.‐G. Zong ◽  
Ying Liu
Keyword(s):  
Energetic Electron ◽  
Interplanetary Shock ◽  
Geosynchronous Orbit ◽  
Shock Impacts

scholarly journals Magnetic dipolarizations inside geosynchronous orbit with tailward ion flows

2019 ◽  
Vol 37 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Xiaoying Sun ◽  
Weining William Liu ◽  
Suping Duan
Keyword(s):  
Plasma Sheet ◽  
Sharp Increase ◽  
Energetic Electron ◽  
Elevation Angle ◽  
Time History ◽  
Geosynchronous Orbit ◽  
Inner Magnetosphere ◽  
Transfer Path ◽  
New Energy ◽  
History Of

Abstract. Electromagnetic field and plasma data from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) near-Earth probes are used to investigate magnetic dipolarizations inside geosynchronous orbit on 27 August 2014 during an intense substorm with AEmax∼1000 nT. THEMIS-D (TH-D) was located inside geosynchronous orbit around midnight in the interval from 09:25 to 09:55 UT. During this period, two distinct magnetic dipolarizations with tailward ion flows are observed by TH-D. The first one is indicated by the magnetic elevation angle increase from 15 to 25∘ around 09:30:40 UT. The tailward perpendicular velocity is V⊥x∼-50 km s−1. The second one is presented by the elevation angle increase from 25 to 45∘ around 09:36 UT, and the tailward perpendicular velocity is V⊥x∼-70 km s−1. These two significant dipolarizations are accompanied with the sharp increase in the energy flux of energetic electron inside geosynchronous orbit. After a 5 min expansion of the near-Earth plasma sheet (NEPS), THEMIS-E (TH-E) located outside geosynchronous orbit also detected this tailward expanding plasma sheet with ion flows of −150 km s−1. The dipolarization propagates tailward with a speed of −47 km s−1 along a 2.2 RE distance in the X direction between TH-D and TH-E within 5 min. These dipolarizations with tailward ion flows observed inside geosynchronous orbit indicate a new energy transfer path in the inner magnetosphere during substorms.

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.

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

Drifting holes in the energetic electron flux at geosynchronous orbit following substorm onset

1992 ◽  
Vol 97 (A5) ◽  
pp. 6541 ◽  
Author(s):  
V. A. Sergeev ◽  
T. Bösinger ◽  
R. D. Belian ◽  
G. D. Reeves ◽  
T. E. Cayton
Keyword(s):  
Electron Flux ◽  
Energetic Electron ◽  
Substorm Onset ◽  
Geosynchronous Orbit

Responses of properties in the plasma sheet and at the geosynchronous orbit to interplanetary shock

2009 ◽  
Vol 54 (18) ◽  
pp. 3308-3317 ◽  
Author(s):  
Li Yao ◽  
ZhenXing Liu ◽  
PingBing Zuo ◽  
LingQian Zhang ◽  
SuPing Duan
Keyword(s):  
Plasma Sheet ◽  
Interplanetary Shock ◽  
Geosynchronous Orbit

Energetic electron components at geosynchronous orbit

1989 ◽  
Vol 16 (2) ◽  
pp. 147-150 ◽  
Author(s):  
T. E. Cayton ◽  
R. D. Belian ◽  
S. P. Gary ◽  
T. A. Fritz ◽  
D. N. Baker
Keyword(s):  
Energetic Electron ◽  
Geosynchronous Orbit

scholarly journals Magnetic dipolarizations inside geosynchronous orbit with tailward ions flow

2018 ◽  
Author(s):  
Xiaoying Sun ◽  
Weining William Liu ◽  
Suping Duan
Keyword(s):  
Plasma Sheet ◽  
Energetic Electron ◽  
Elevation Angle ◽  
Time History ◽  
Geosynchronous Orbit ◽  
Inner Magnetosphere ◽  
Ion Flow ◽  
Transfer Path ◽  
New Energy ◽  
History Of

Abstract. Electromagnetic field and plasma data from the Time History of Events and Macroscale Interactions duringSubstorms (THEMIS) near-Earth probes are used to investigate magnetic dipolarizations inside geosynchronous orbit on 27 August 2014 during an intense substorm with AEmax ~ 1000 nT. THEMIS-D (TH-D) was located inside geosynchronous orbit around midnight in the interval from 09:25 UT to 09:55 UT. During this period two distinct magnetic dipolarizations with tailward ions flow are observed by TH-D. The first one is displayed by magnetic elevation angle increase from 15 degree to 25 degree around 09:30:40 UT. The tailward perpendicular velocity is V⟂x ~ −50 km/s. The second one is presented by the elevation angle increase from 25 degree to 45 degree around 09:36 UT. And the tailward perpendicular velocity is V⟂x ~ −70 km/s. These two significant dipolarizations are accompanied with the sharp increase in the energy flux of energetic electron inside geosynchronous. After 5 min expanding of near-Earth plasma sheet (NEPS), THEMIS-E (TH-E) located outside geosynchronous orbit also detects this tailward expanding plasma sheet with ion flow −150 km/s. The dipolarization propagates tailward with speed −47 km/s, along 2.2 RE distance in the X direction between TH-D and TH-E within 5 min. These dipolarizations with tailward ions flow observed inside geosynchronous orbit indicate new energy transfer path in the inner magnetosphere during substorms.

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