scholarly journals Nonlinearity in chorus waves during a geomagnetic storm on 1 November 2012

2016 ◽  
Vol 121 (1) ◽  
pp. 358-373 ◽  
Author(s):  
H. Matsui ◽  
K. W. Paulson ◽  
R. B. Torbert ◽  
H. E. Spence ◽  
C. A. Kletzing ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Chorus Waves

scholarly journals DEMETER observations of high-latitude chorus waves penetrating the plasmasphere during a geomagnetic storm

2013 ◽  
Vol 40 (22) ◽  
pp. 5827-5832 ◽  
Author(s):  
Zeren Zhima ◽  
Jinbin Cao ◽  
Wenlong Liu ◽  
Huishan Fu ◽  
Junying Yang ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
High Latitude ◽  
Chorus Waves

Chorus acceleration of relativistic electrons in extremely low L-shell during geomagnetic storm

2020 ◽  
Author(s):  
Zhenxia Zhang ◽  
Lunjin Chen ◽  
Si Liu ◽  
Ying Xiong ◽  
Xinqiao Li ◽  
...  
Keyword(s):  
Geomagnetic Storm ◽  
Radiation Belt ◽  
Electron Acceleration ◽  
Acceleration Process ◽  
Relativistic Electrons ◽  
Chorus Waves ◽  
Van Allen Probes ◽  
New Finding ◽  
First Time ◽  
Shell Region

<p>Based on data from the Van Allen Probes and ZH-1 satellites, relativistic electron enhancements in extremely low L-shell Regions (reaching L~3) were observed during major geomagnetic storm (minimum Dst`-190 nT).  Contrary to what occurs in the outer belt, such an intense and deep electron penetration event is rare and more interesting. Strong whistler-mode (chorus and hiss) waves, with amplitudes 81-126 pT, were also observed in the extremely low L-shell simultaneously (reaching L~2.5) where the plasmapause was suppressed. The bounce-averaged diffusion coefficient calculations support that the chorus waves can play a significantly important role in diffusing and accelerating the 1-3 MeV electrons even in such low L-shells during storms. This is the first time that the electron acceleration induced by chorus waves in the extremely low L-shell region is reported. This new finding will help to deeply understand the electron acceleration process in radiation belt physics.</p>

What is an “Intense Geomagnetic Storm"?

Space Weather ◽  
2006 ◽  
Vol 4 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yohsuke Kamide
Keyword(s):  
Geomagnetic Storm

The influence of various frequency chorus waves on electron dynamics in radiation belts

2020 ◽  
Vol 64 (4) ◽  
pp. 890-897
Author(s):  
JiaBei He ◽  
YuYue Jin ◽  
FuLiang Xiao ◽  
ZhaoGuo He ◽  
Chang Yang ◽  
...  
Keyword(s):  
Radiation Belts ◽  
Electron Dynamics ◽  
Chorus Waves

scholarly journals Penetration of MeV electrons into the mesosphere accompanying pulsating aurorae

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Y. Miyoshi ◽  
K. Hosokawa ◽  
S. Kurita ◽  
S.-I. Oyama ◽  
Y. Ogawa ◽  
...  
Keyword(s):  
High Energy ◽  
Daily Basis ◽  
Maximum Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Whistler Mode ◽  
Chorus Waves ◽  
Mesospheric Ozone ◽  
Field Lines ◽  
Eiscat Radar

AbstractPulsating aurorae (PsA) are caused by the intermittent precipitations of magnetospheric electrons (energies of a few keV to a few tens of keV) through wave-particle interactions, thereby depositing most of their energy at altitudes ~ 100 km. However, the maximum energy of precipitated electrons and its impacts on the atmosphere are unknown. Herein, we report unique observations by the European Incoherent Scatter (EISCAT) radar showing electron precipitations ranging from a few hundred keV to a few MeV during a PsA associated with a weak geomagnetic storm. Simultaneously, the Arase spacecraft has observed intense whistler-mode chorus waves at the conjugate location along magnetic field lines. A computer simulation based on the EISCAT observations shows immediate catalytic ozone depletion at the mesospheric altitudes. Since PsA occurs frequently, often in daily basis, and extends its impact over large MLT areas, we anticipate that the PsA possesses a significant forcing to the mesospheric ozone chemistry in high latitudes through high energy electron precipitations. Therefore, the generation of PsA results in the depletion of mesospheric ozone through high-energy electron precipitations caused by whistler-mode chorus waves, which are similar to the well-known effect due to solar energetic protons triggered by solar flares.

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