scholarly journals Substorm simulation: Quiet and N‐S arcs preceding auroral breakup

2016 ◽  
Vol 121 (2) ◽  
pp. 1201-1218 ◽  
Author(s):  
Y. Ebihara ◽  
T. Tanaka
Keyword(s):  
Auroral Breakup

On the physical nature of auroral breakup precursors as observed in an event on 5 March 2008

2015 ◽  
Vol 55 (2) ◽  
pp. 210-218 ◽  
Author(s):  
I. A. Kornilov ◽  
T. A. Kornilova ◽  
I. V. Golovchanskaya
Keyword(s):  
Physical Nature ◽  
Auroral Breakup

scholarly journals Dawn Auroral Breakup at Saturn Initiated by Auroral Arcs: UVIS/Cassini Beginning of Grand Finale Phase

2017 ◽  
Vol 122 (12) ◽  
pp. 12,111-12,119 ◽  
Author(s):  
A. Radioti ◽  
D. Grodent ◽  
Z. H. Yao ◽  
J.-C. Gérard ◽  
S. V. Badman ◽  
...  
Keyword(s):  
Auroral Breakup ◽  
Auroral Arcs

scholarly journals Anomalous ISR echoes preceding auroral breakup: Evidence for strong Langmuir turbulence

2012 ◽  
Vol 39 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
H. Akbari ◽  
J. L. Semeter ◽  
H. Dahlgren ◽  
M. Diaz ◽  
M. Zettergren ◽  
...  
Keyword(s):  
Langmuir Turbulence ◽  
Auroral Breakup ◽  
Strong Langmuir Turbulence

scholarly journals Imaging and EISCAT radar measurements of an auroral prebreakup event

1996 ◽  
Vol 14 (11) ◽  
pp. 1170-1176
Author(s):  
V. Safargaleev ◽  
T. Turunen ◽  
W. Lyatsky ◽  
J. Manninen ◽  
A. Kozlovsky
Keyword(s):  
Electric Field ◽  
Ion Temperature ◽  
Auroral Breakup ◽  
E Region ◽  
Radar Measurements ◽  
Eiscat Radar ◽  
Extended Area ◽  
Auroral Arcs ◽  
Plasma Depletion

Abstract. The results of coordinated EISCAT and TV-camera observations of a prebreakup event on 15 November 1993 have been considered. The variations of the luminosity of two parallel auroral arcs, plasma depletion on the poleward edge of one of these arcs as well as electron and ion temperatures in front of a westward travelling surge were studied. It was found that a short-lived brightening of a weak zenith arc before an auroral breakup was accompanied by fading of an equatorial arc and, vice versa. A plasma depletion in the E region was detected by the EISCAT radar on the poleward edge of the zenith arc just before the auroral breakup. The plasma depletion was associated with an enhancement of ion (at the altitudes of 150–200 km) and electron (in E region) temperatures. During its occurrence, the electric field in the E-region was extremely large (~150 mV/m). A significant increase in ion temperature was also observed 1 min before the arrival of a westward travelling surge (WTS) at the radar zenith. This was interpreted as the existence of an extended area of enhanced electric field ahead of the WTS.

scholarly journals Luminosity variations in several parallel auroral arcs before auroral breakup

1997 ◽  
Vol 15 (8) ◽  
pp. 959-966 ◽  
Author(s):  
V. Safargaleev ◽  
W. Lyatsky ◽  
V. Tagirov
Keyword(s):  
Spatial Resolution ◽  
Characteristic Time ◽  
Auroral Breakup ◽  
Temporal And Spatial ◽  
Auroral Arcs

Abstract. Variation of the luminosity in two parallel auroral arcs before auroral breakup has been studied by using digitised TV-data with high temporal and spatial resolution. The intervals when a new arc appears near already existing one were chosen for analysis. It is shown, for all cases, that the appearance of a new arc is accompanied by fading or disappearance of another arc. We have named these events out-of-phase events, OP. Another type of luminosity variation is characterised by almost simultaneous enhancement of intensity in the both arcs (in-phase event, IP). The characteristic time of IP events is 10–20 s, whereas OP events last about one minute. Sometimes out-of-phase events begin as IP events. The possible mechanisms for OP and IP events are discussed.

Timing and location of phenomena during auroral breakup: A case study

2002 ◽  
Vol 30 (7) ◽  
pp. 1775-1778 ◽  
Author(s):  
A.G. Yahnin ◽  
V.A. Sergeev ◽  
M.V. Kubyshkina ◽  
T.I. Pulkkinen ◽  
K. Liou ◽  
...  
Keyword(s):  
Auroral Breakup

Proton precipitation during the auroral breakup

1974 ◽  
Vol 22 (5) ◽  
pp. 735-736 ◽  
Author(s):  
A.E. Belon ◽  
G.J. Romick ◽  
W.J. Stringer
Keyword(s):  
Auroral Breakup ◽  
Proton Precipitation
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