On the radiation belt location during the 23rd and 24th solar cycles
Alexei Dmitriev,Alexei Dmitriev +1 more
TL;DR: In this paper, the location of theouter radiation belt (ORB) was determined using NOAA/Polar-orbiting OPERATIONAL Environmental Satellite (POES) observations of energetic electrons with ≥ 30 keV.
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Abstract: . Within the last two solar cycles (from 2001 to 2018), the location of the
outer radiation belt (ORB) was determined using NOAA/Polar-orbiting
Operational Environmental Satellite (POES) observations of energetic electrons with
energies above 30 keV. It was found that the ORB was shifted a little
( ∼1 ∘ ) in the European and North American sectors, while
in the Siberian sector the ORB was displaced equatorward by more than 3 ∘ . The displacements corresponded qualitatively to the change in the geomagnetic field predicted by the IGRF-12 model. However, in the Siberian sector, the model has a tendency to underestimate the equatorward shift of the ORB. The shift became prominent after 2012, which might have been related to a
geomagnetic “jerk” that occurred in 2012–2013. The displacement of the ORB to lower latitudes in the Siberian sector can contribute to an increase in the occurrence rate of midlatitude auroras observed in the Eastern Hemisphere.
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Citations
Spatial Evolution of Energetic Electrons Affecting the Upper Atmosphere during the Last Two Solar Cycles
TL;DR: In this paper , the authors show that the area of electron precipitation from the outer ERB shifts equator-wards to Siberia, and further show a substantive decrease in the intensity of energetic electrons in the South Atlantic Anomaly from the 23rd to the 24th solar cycles.
•Journal Article
Ultra-low-frequency wave-driven diffusion of radiation belt relativistic electrons
TL;DR: The results demonstrate that the ULF waves moved the inner edge of the outer radiation belt earthward 0.3 Earth radii and enhanced the relativistic electron fluxes by up to one order of magnitude near the slot region within about 10 h, providing strong evidence for the radial diffusion of radiation belt relativist electrons.
4
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Long term measurements of radiation belts by SAMPEX and their variations
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