Simultaneous Observations of ELF/VLF Rising‐Tone Quasiperiodic Waves and Energetic Electron Precipitations in the High‐Latitude Upper Ionosphere

2020 ◽  
Vol 125 (5) ◽  
Author(s):  
Zeren Zhima ◽  
Jianping Huang ◽  
Xuhui Shen ◽  
Zhiyang Xia ◽  
Lunjin Chen ◽  
...  
Keyword(s):  
High Latitude ◽  
Energetic Electron ◽  
Upper Ionosphere

scholarly journals Magnetic topology of coronal mass ejection events out of the ecliptic: Ulysses/HI-SCALE energetic particle observations

2003 ◽  
Vol 21 (6) ◽  
pp. 1249-1256 ◽  
Author(s):  
O. E. Malandraki ◽  
E. T. Sarris ◽  
G. Tsiropoula
Keyword(s):  
Magnetic Field ◽  
High Latitude ◽  
Energetic Particle ◽  
Large Scale ◽  
Energetic Electron ◽  
Solar Energetic Particle ◽  
Interplanetary Coronal Mass Ejections ◽  
Interplanetary Magnetic Fields ◽  
Interplanetary Physics ◽  
Field Lines

Abstract. Solar energetic particle fluxes (Ee > 38 keV) observed by the ULYSSES/HI-SCALE experiment are utilized as diagnostic tracers of the large-scale structure and topology of the Interplanetary Magnetic Field (IMF) embedded within two well-identified Interplanetary Coronal Mass Ejections (ICMEs) detected at 56° and 62° south heliolatitudes by ULYSSES during the solar maximum southern high-latitude pass. On the basis of the energetic solar particle observations it is concluded that: (A) the high-latitude ICME magnetic structure observed in May 2000 causes a depression in the solar energetic electron intensities which can be accounted for by either a detached or an attached magnetic field topology for the ICME; (B) during the traversal of the out-of-ecliptic ICME event observed in July 2000 energetic electrons injected at the Sun are channeled by the ICME and propagate freely along the ICME magnetic field lines to 62° S heliolatitude.Key words. Interplanetary physics (energetic particles; interplanetary magnetic fields)

scholarly journals Statistics of the field-aligned currents at the high-latitude energetic electron boundaries in the nightside: Cluster observation

2016 ◽  
Vol 121 (3) ◽  
pp. 1979-1989 ◽  
Author(s):  
Jie Ren ◽  
Q. G. Zong ◽  
X. Z. Zhou ◽  
Hui Zhang ◽  
S. Y. Fu ◽  
...  
Keyword(s):  
High Latitude ◽  
Energetic Electron

scholarly journals Energetic electron precipitation during substorm injection events: High-latitude fluxes and an unexpected midlatitude signature

2008 ◽  
Vol 113 (A10) ◽  
Author(s):  
Mark A. Clilverd ◽  
Craig J. Rodger ◽  
James Brundell ◽  
John Bähr ◽  
Neil Cobbett ◽  
...  
Keyword(s):  
High Latitude ◽  
Energetic Electron ◽  
Electron Precipitation ◽  
Substorm Injection

scholarly journals Sub-ionospheric VLF signal anomaly due to geomagnetic storms: a statistical study

2015 ◽  
Vol 33 (11) ◽  
pp. 1457-1467 ◽  
Author(s):  
K. Tatsuta ◽  
Y. Hobara ◽  
S. Pal ◽  
M. Balikhin
Keyword(s):  
Geomagnetic Storm ◽  
High Latitude ◽  
Geomagnetic Storms ◽  
Energetic Electron ◽  
Low Frequency ◽  
Signal Amplitude ◽  
Occurrence Rate ◽  
Statistical Parameters ◽  
Time Period ◽  
Propagation Paths

Abstract. We investigate quantitatively the effect of geomagnetic storms on the sub-ionospheric VLF/LF (Very Low Frequency/Low Frequency) propagations for different latitudes based on 2-year nighttime data from Japanese VLF/LF observation network. Three statistical parameters such as average signal amplitude, variability of the signal amplitude, and nighttime fluctuation were calculated daily for 2 years for 16–21 independent VLF/LF transmitter–receiver propagation paths consisting of three transmitters and seven receiving stations. These propagation paths are suitable to simultaneously study high-latitude, low-mid-latitude and mid-latitude D/E-region ionospheric properties. We found that these three statistical parameters indicate significant anomalies exceeding at least 2 times of their standard deviation from the mean value during the geomagnetic storm time period in the high-latitude paths with an occurrence rate of anomaly between 40 and 50 % presumably due to the auroral energetic electron precipitation. The mid-latitude and low-mid-latitude paths have a smaller influence from the geomagnetic activity because of a lower occurrence rate of anomalies even during the geomagnetically active time period (from 20 to 30 %). The anomalies except geomagnetic storm periods may be caused by atmospheric and/or lithospheric origins. The statistical occurrence rates of ionospheric anomalies for different latitudinal paths during geomagnetic storm and non-storm time periods are basic and important information not only to identify the space weather effects toward the lower ionosphere depending on the latitudes but also to separate various external physical causes of lower ionospheric disturbances.

He ion dominance in the high-latitude upper ionosphere as observed in “active” experiment

1998 ◽  
Vol 22 (9) ◽  
pp. 1381-1384 ◽  
Author(s):  
V.A Ershova ◽  
V.A Kochnev ◽  
O.Z Roste ◽  
Yu.A Shultchishin ◽  
J Šmilauer ◽  
...  
Keyword(s):  
High Latitude ◽  
Active Experiment ◽  
Upper Ionosphere
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