scholarly journals Refilling of the slot region between the inner and outer electron radiation belts during geomagnetic storms

2007 ◽  
Vol 112 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
R. M. Thorne ◽  
Y. Y. Shprits ◽  
N. P. Meredith ◽  
R. B. Horne ◽  
W. Li ◽  
...  
Keyword(s):  
Geomagnetic Storms ◽  
Radiation Belts ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals The Response of the Energy Content of the Outer Electron Radiation Belt to Geomagnetic Storms

2018 ◽  
Vol 123 (10) ◽  
pp. 8227-8240 ◽  
Author(s):  
Ying Xiong ◽  
Lun Xie ◽  
Lunjin Chen ◽  
Binbin Ni ◽  
Suiyan Fu ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Geomagnetic Storms ◽  
Energy Content ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals A density-temperature description of the outer electron radiation belt during geomagnetic storms

2010 ◽  
Vol 115 (A1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Michael H. Denton ◽  
Joseph E. Borovsky ◽  
Thomas E. Cayton
Keyword(s):  
Radiation Belt ◽  
Geomagnetic Storms ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval

2018 ◽  
Vol 36 (4) ◽  
pp. 1131-1140 ◽  
Author(s):  
Maria O. Riazanteseva ◽  
Elizaveta E. Antonova ◽  
Marina V. Stepanova ◽  
Boris V. Marjin ◽  
Ilia A. Rubinshtein ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Geomagnetic Storms ◽  
Background Level ◽  
Auroral Oval ◽  
Electron Radiation ◽  
Outer Electron ◽  
Outer Radiation Belt ◽  
Auroral Electrons ◽  
The Difference ◽  
Scintillator Detectors

Abstract. Finding the position of the polar boundary of the outer electron radiation belt, relative to the position of the auroral oval, is a long-standing problem. Here we analyze it using the data of the METEOR-M1 auroral satellite for the period from 11 November 2009 to 27 March 2010. The geomagnetic conditions during the analyzed period were comparatively quiet. METEOR-M1 has a polar solar-synchronous circular orbit with an altitude of ≈832 km, a period of 101.3 min, and an inclination of 98∘. We analyze flux observations of auroral electrons with energies between 0.03 and 16 keV, and electrons with energies >100 keV, measured simultaneously by the GGAK-M set of instruments, composed of semiconductors, scintillator detectors, and electrostatic analyzers. We assume that in the absence of geomagnetic storms the polar boundary of the outer radiation belt can be identified as a decrease in the count rate of precipitating energetic electrons to the background level. It was found that this boundary can be located both inside the auroral oval or equatorward of the equatorial boundary of the auroral precipitation. It was also found that for slightly disturbed geomagnetic conditions the polar boundary of the outer radiation belt is almost always located inside the auroral oval. We observe that the difference between the position of the polar boundary of the outer radiation belt and the position of the equatorial boundary of the auroral precipitation depend on the AE and PC indices of geomagnetic activity. The implications of these results in the analysis of the formation of the outer radiation belt are discussed.

scholarly journals Dynamics of the Electron Belts

2021 ◽  
pp. 213-240
Author(s):  
Hannu E. J. Koskinen ◽  
Emilia K. J. Kilpua
Keyword(s):  
Solar Wind ◽  
Large Scale ◽  
Geomagnetic Storms ◽  
Radiation Belts ◽  
Satellite Observations ◽  
Interplanetary Shocks ◽  
Outer Electron ◽  
Structure And Dynamics ◽  
The Earth ◽  
Pressure Pulses

AbstractIn this chapter we discuss the overall structure and dynamics of the electron belts and some of their peculiar features. We also consider the large-scale solar wind structures that drive geomagnetic storms and detail the specific responses of radiation belts on them. Numerous satellite observations have highlighted the strong variability of the outer electron belt and the slot region during the storms, and the energy and L-shell dependence of these variations. The belts can also experience great variations when interplanetary shocks or pressure pulses impact the Earth, even without a following storm sequence.

scholarly journals The Response of Earth's Electron Radiation Belts to Geomagnetic Storms: Statistics From the Van Allen Probes Era Including Effects From Different Storm Drivers

2019 ◽  
Vol 124 (2) ◽  
pp. 1013-1034 ◽  
Author(s):  
D. L. Turner ◽  
E. K. J. Kilpua ◽  
H. Hietala ◽  
S. G. Claudepierre ◽  
T. P. O'Brien ◽  
...  
Keyword(s):  
Geomagnetic Storms ◽  
Radiation Belts ◽  
Electron Radiation ◽  
Van Allen Probes

scholarly journals A relation between the locations of the polar boundary of outer electron radiation belt and the equatorial boundary of the auroral oval

2018 ◽  
Author(s):  
Maria O. Riazanteseva ◽  
Elizaveta E. Antonova ◽  
Marina V. Stepanova ◽  
Boris V. Marjin ◽  
Ilia A. Rubinshtein ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Geomagnetic Storms ◽  
Outer Boundary ◽  
Background Level ◽  
Auroral Oval ◽  
External Boundary ◽  
Electron Radiation ◽  
Outer Electron ◽  
Outer Radiation Belt ◽  
The Difference

Abstract. Finding the position of the external boundary of the outer electron radiation belt, relative to the position of the auroral oval, is a long-standing problem. Here we analyze it using data of the Meteor-M No. 1 auroral satellite for the period from 11 November 2009 to 27 March 2010. The geomagnetic conditions during the analyzed period were comparatively quiet. Meteor-M No. 1 has a polar solar-synchronous circular orbit with an altitude of ~ 832 km, a period of 101.3 min, and an inclination of 98°. We analyze flux observations of auroral electrons with energies between 0.03 and 16 keV, and electrons with energies > 100 keV, measured simultaneously by the GGAK-M set of instruments, composed by semiconductors, scintillator detectors, and electrostatic analyzers. We assume that at the absence of geomagnetic storms the external boundary of the outer radiation belt can be identified as a decrease in the count rate of precipitating energetic electrons to the background level. It was found that this boundary can be located both inside the auroral oval or to the equator from the equatorial boundary of the auroral precipitations. It was also found that for disturbed geomagnetic conditions the external boundary of the outer radiation belt is almost always located inside the auroral oval. We observe that the difference between the position of the outer boundary of the outer radiation belt and the position of the equatorial boundary of auroral precipitations depends on the AE and PC indexes of geomagnetic activity. The implications of these results in the analysis of the formation of the outer radiation belt is discussed.

On the effect of ULF waves on the outer radiation belt during geomagnetic storms

2021 ◽  
Author(s):  
Christopher Lara ◽  
Pablo S. Moya ◽  
Victor Pinto ◽  
Javier Silva ◽  
Beatriz Zenteno
Keyword(s):  
Relativistic Electron ◽  
Radiation Belt ◽  
Geomagnetic Storms ◽  
Cumulative Effect ◽  
Radiation Belts ◽  
Ulf Waves ◽  
Relativistic Electrons ◽  
Relative Role ◽  
Outer Radiation Belt ◽  
Ulf Wave

<p>The inner magnetosphere is a very important region to study, as with satellite-based communications increasing day after day, possible disruptions are especially relevant due to the possible consequences in our daily life. It is becoming very important to know how the radiation belts behave, especially during strong geomagnetic activity. The radiation belts response to geomagnetic storms and solar wind conditions is still not fully understood, as relativistic electron fluxes in the outer radiation belt can be depleted, enhanced or not affected following intense activity. Different studies show how these results vary in the face of different events. As one of the main mechanisms affecting the dynamics of the radiation belt are wave-particle interactions between relativistic electrons and ULF waves. In this work we perform a statistical study of the relationship between ULF wave power and relativistic electron fluxes in the outer radiation belt during several geomagnetic storms, by using magnetic field and particle fluxes data measured by the Van Allen Probes between 2012 and 2017. We evaluate the correlation between the changes in flux and the cumulative effect of ULF wave activity during the main and recovery phases of the storms for different position in the outer radiation belt and energy channels. Our results show that there is a good correlation between the presence of ULF waves and the changes in flux during the recovery phase of the storm and that correlations vary as a function of energy. Also, we can see in detail how the ULF power change for the electron flux at different L-shell We expect these results to be relevant for the understanding of the relative role of ULF waves in the enhancements and depletions of energetic electrons in the radiation belts for condition described.</p>

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