Results 31 to 40 of about 1,100 (241)

The ring current, geomagnetic disturbance, and the Van Allen radiation belts [PDF]

Journal of Geophysical Research, 1961
The large decrease in the horizontal component of the earth's field during the main phase of magnetic storms is ascribed to the formation or enhancement of a geomagnetic ring current. The motions of particles trapped in the earth's dipole field and the resulting ring current are discussed. These calculations deal only with a steady state, though during
Sydney Chapman, Syun-Ichi Akasofu
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Radiation Belt Daily Average Electron Flux Model (RB‐Daily‐E) From the Seven‐Year Van Allen Probes Mission and Its Application to Interpret GPS On‐Orbit Solar Array Degradation

Space Weather, 2022
We use NASA's Van Allen Probes data to build a 3‐dimensional Radiation Belt Daily Average Electron flux model (RB‐Daily‐E) covering 25 differential energies (33–7,700 keV), 17 pitch angles, and a variable number of L shells from 2 to 7. RB‐Daily‐E can be
Christine Gabrielse, Justin H. Lee, Seth Claudepierre, Don Walker, Paul O’Brien, James Roeder, Yao Lao, Jann Grovogui, Drew L. Turner, Andrei Runov, Alexander Boyd, Joseph Fennell, J. Bernard Blake, Kevin Lopez, Yoshizumi Miyoshi, Kunihiro Keika, Nana Higashio, Iku Shinohara, Shun Imajo, Satoshi Kurita, Takefumi Mitani   +20 more
doaj   +1 more source

Specifying High‐Altitude Electrons Using Low‐Altitude LEO Systems: The SHELLS Model

Space Weather, 2020
We describe an artificial neural network model of the near‐Earth space radiation environment. The geomagnetic activity index Kp and low‐earth‐orbit (LEO) electron flux measurements from the National Oceanic and Atmospheric Administration Polar‐orbiting ...
S. G. Claudepierre, T. P. O'Brien
doaj   +1 more source

Reconstruction of the Radiation Belts for Solar Cycles 17–24 (1933–2017)

Space Weather, 2021
We present a reconstruction of the dynamics of the radiation belts from solar cycles 17 to 24 which allows us to study how radiation belt activity has varied between the different solar cycles.
A. A. Saikin, Y. Y. Shprits, A. Y. Drozdov, D. A. Landis, I. S. Zhelavskaya, S. Cervantes   +5 more
doaj   +1 more source

An event of extreme relativistic and ultra-relativistic electron enhancements following the arrival of consecutive corotating interaction regions: Coordinated observations by Van Allen Probes, Arase, THEMIS and Galileo satellites

Frontiers in Astronomy and Space Sciences, 2022
During July to October of 2019, a sequence of isolated Corotating Interaction Regions (CIRs) impacted the magnetosphere, for four consecutive solar rotations, without any interposed Interplanetary Coronal Mass Ejections.
Afroditi Nasi, Christos Katsavrias, Ioannis A. Daglis, Ioannis A. Daglis, Ingmar Sandberg, Sigiava Aminalragia-Giamini, Sigiava Aminalragia-Giamini, Wen Li, Yoshizumi Miyoshi, Hugh Evans, Takefumi Mitani, Ayako Matsuoka, Iku Shinohara, Takeshi Takashima, Tomoaki Hori, Georgios Balasis   +15 more
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Explaining occurrences of auroral kilometric radiation in Van Allen radiation belts [PDF]

Geophysical Research Letters, 2016
AbstractAuroral kilometric radiation (AKR) is a strong terrestrial radio emission and dominates at higher latitudes because of reflection in vicinities of the source cavity and plasmapause. Recently, Van Allen Probes have observed occurrences of AKR emission in the equatorial region of Earth's radiation belts but its origin still remains an open ...
Fuliang Xiao, Qinghua Zhou, Zhenpeng Su, Zhaoguo He, Chang Yang, Si Liu, Yihua He, Zhonglei Gao   +7 more
openaire   +1 more source

Can strong substorm-associated MeV electron injections be an important cause of large radiation belt enhancements?

Frontiers in Astronomy and Space Sciences, 2023
It has become well-established that strong outer radiation belt enhancements are due to wave-driven electron energization by whistler-mode chorus waves.
Hee-Jeong Kim, S. J. Noh, S. J. Noh, D. Y. Lee, L. Lyons, J. Bortnik, T. Nagai, W. Choe, M. Hua   +8 more
doaj   +1 more source

Explaining the dynamics of the ultra-relativistic third Van Allen radiation belt [PDF]

Nature Physics, 2016
Since the discovery of the Van Allen radiation belts over 50 years ago, an explanation for their complete dynamics has remained elusive. Especially challenging is understanding the recently discovered ultra-relativistic third electron radiation belt.
I. J. Rae, Harlan E. Spence, Farideh Honary, A. J. Boyd, Seth G. Claudepierre, Daniel N. Baker, Geoffrey D. Reeves, Stavros Dimitrakoudis, Louis Ozeke, David K. Milling, Drew Turner, A. Kale, Howard J. Singer, Kyle R. Murphy, Kyle R. Murphy, Ioannis A. Daglis, Ian R. Mann   +16 more
openaire   +4 more sources

The Phase Space Density Evolution of Radiation Belt Electrons under the Action of Solar Wind Dynamic Pressure

Magnetochemistry, 2023
Earth’s radiation belt and ring current are donut-shaped regions of energetic and relativistic particles, trapped by the geomagnetic field. The strengthened solar wind dynamic pressure (Pdyn) can alter the structure of the geomagnetic field, which can ...
Peng Hu, Haimeng Li, Zhihai Ouyang, Rongxin Tang, Liangjin Song, An Yuan, Bopu Feng, Yangyang Wang, Wenqian Zou   +8 more
doaj   +1 more source

The 600 keV electron injections in the Earth’s outer radiation belt: A statistical study

Earth and Planetary Physics, 2022
Relativistic electron injections are one of the mechanisms of relativistic (≥0.5 MeV) electron enhancements in the Earth’s outer radiation belt. In this study, we present a statistical observation of 600 keV electron injections in the outer radiation ...
ChaoLing Tang, Xu Wang, BinBin Ni, ZhengPeng Su, JiChun Zhang   +4 more
doaj   +1 more source