Quiet-time characteristics of middle-latitude Whistler-mode signals during an 8-yr period

1975 ◽  
Vol 37 (3) ◽  
pp. 531-543 ◽  
Author(s):  
F.A McNeill ◽  
M.K Andrews
Keyword(s):  
Middle Latitude ◽  
Quiet Time ◽  
Whistler Mode

scholarly journals Longitudinal dependence of middle and low latitude zonal plasma drifts measured by DE-2

2007 ◽  
Vol 25 (12) ◽  
pp. 2551-2559 ◽  
Author(s):  
J. W. Jensen ◽  
B. G. Fejer
Keyword(s):  
Middle Latitude ◽  
Early Morning ◽  
Quiet Time ◽  
Low Latitude ◽  
Late Night ◽  
Middle Latitudes ◽  
Plasma Drifts ◽  
Longitudinal Variations ◽  
December Solstice ◽  
European Sector

Abstract. We used ion drift observations from the DE-2 satellite to study for the first time the longitudinal variations of middle and low latitude F region zonal plasma drifts during quiet and disturbed conditions. The quiet-time middle latitude drifts are predominantly westward; the low latitude drifts are westward during the day and eastward at night. The daytime quiet-time drifts do not change much with longitude; the nighttime drifts have strong season dependent longitudinal variations. In the dusk-premidnight period, the equinoctial middle latitude westward drifts are smallest in the European sector and the low latitude eastward drifts are largest in the American-Pacific sector. The longitudinal variations of the late night-early morning drifts during June and December solstice are anti-correlated. During geomagnetically active times, there are large westward perturbation drifts in the late afternoon-early night sector at upper middle latitudes, and in the midnight sector at low latitudes. The largest westward disturbed drifts during equinox occur in European sector, and the smallest in the Pacific region. These results suggest that during equinox SAPS events occur most often at European longitudes. The low latitude perturbation drifts do not show significant longitudinal

Low‐Latitude Whistler‐Mode and Higher‐Latitude Z‐mode Emission at Jupiter Observed by Juno

2020 ◽  
Author(s):  
J. D. Menietti ◽  
T. F. Averkamp ◽  
M. Imai ◽  
W. S. Kurth ◽  
G. B. Clark ◽  
...  
Keyword(s):  
Low Latitude ◽  
Whistler Mode

Generation of electrostatic emissions by lightning-induced whistler-mode radiation above thunderstorms

2000 ◽  
Vol 62 (15) ◽  
pp. 1393-1404 ◽  
Author(s):  
S.D Baker ◽  
M.C Kelley ◽  
C.M Swenson ◽  
J Bonnell ◽  
D.V Hahn
Keyword(s):  
Whistler Mode

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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