scholarly journals Auroral particle precipitation characterized by the substorm cycle

2013 ◽  
Vol 118 (3) ◽  
pp. 1022-1039 ◽  
Author(s):  
Simon Wing ◽  
Matina Gkioulidou ◽  
Jay R. Johnson ◽  
Patrick T. Newell ◽  
Chih-Ping Wang
Keyword(s):  
Particle Precipitation ◽  
Auroral Particle Precipitation

scholarly journals Strong sunward propagating flow bursts in the night sector during quiet solar wind conditions: SuperDARN and satellite observations

2002 ◽  
Vol 20 (6) ◽  
pp. 771-779 ◽  
Author(s):  
C. Senior ◽  
J.-C. Cerisier ◽  
F. Rich ◽  
M. Lester ◽  
G. K. Parks
Keyword(s):  
Convective Transport ◽  
High Time Resolution ◽  
Polar Cap ◽  
Particle Precipitation ◽  
Phase Velocities ◽  
Plasma Injection ◽  
Night Side ◽  
Magnetospheric Boundaries ◽  
Auroral Particle Precipitation ◽  
Imf Clock Angle

Abstract. High-time resolution data from the two Iceland SuperDARN HF radars show very strong nightside convection activity during a prolonged period of low geomagnetic activity and northward interplanetary magnetic field (IMF). Flows bursts with velocities ranging from 0.8 to 1.7 km/s are observed to propagate in the sunward direction with phase velocities up to 1.5 km/s. These bursts occur over several hours of MLT in the 20:00–01:00 MLT sector, in the evening-side sunward convection. Data from a simultaneous DMSP pass and POLAR UVI images show a very contracted polar cap and extended regions of auroral particle precipitation from the magnetospheric boundaries. A DMSP pass over the Iceland-West field-of-view while one of these sporadic bursts of enhanced flow is observed, indicates that the flow bursts appear within the plasma sheet and at its outward edge, which excludes Kelvin-Helmholtz instabilities at the magnetopause boundary as the generation mechanism. In the nightside region, the precipitation is more spot-like and the convection organizes itself as clockwise U-shaped structures. We interpret these flow bursts as the convective transport following plasma injection events from the tail into the night-side ionosphere. We show that during this period, where the IMF clock angle is around 70°, the dayside magnetosphere is not completely closed.Key words. Ionosphere (Auroral ionosphere; Ionospheremagnetosphere interactions; Particle precipitation)

scholarly journals VLF remote sensing of high-energy auroral particle precipitation

1997 ◽  
Vol 102 (A4) ◽  
pp. 7477-7484 ◽  
Author(s):  
S. A. Cummer ◽  
T. F. Bell ◽  
U. S. Inan ◽  
D. L. Chenette
Keyword(s):  
Remote Sensing ◽  
High Energy ◽  
Particle Precipitation ◽  
Auroral Particle Precipitation

scholarly journals Quasiperiodic ∼5-60 s fluctuations of VLF signals propagating in the Earth-ionosphere waveguide: A result of pulsating auroral particle precipitation?

1997 ◽  
Vol 102 (A1) ◽  
pp. 347-361 ◽  
Author(s):  
D. L. Carpenter ◽  
M. Galand ◽  
T. F. Bell ◽  
V. S. Sonwalkar ◽  
U. S. Inan ◽  
...  
Keyword(s):  
Particle Precipitation ◽  
The Earth ◽  
Auroral Particle Precipitation
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