SBARMO-79; A multi-balloon campaign in the auroral zone

1982 ◽  
pp. 153-158 ◽  
Author(s):  
P. Tanskanen ◽  
J. Bjordal ◽  
L.P. Block ◽  
K. Brønstad ◽  
A. Egeland ◽  
...  
Keyword(s):  
Auroral Zone

Influence of inhomogeneities of the plasma density and electric field on the generation of electrostatic noise in the auroral zone

2015 ◽  
Vol 41 (3) ◽  
pp. 254-261 ◽  
Author(s):  
A. A. Chernyshov ◽  
A. A. Ilyasov ◽  
M. M. Mogilevskii ◽  
I. V. Golovchanskaya ◽  
B. V. Kozelov
Keyword(s):  
Electric Field ◽  
Plasma Density ◽  
Auroral Zone

Balloon observations of X rays in the auroral zone II

1960 ◽  
Vol 65 (11) ◽  
pp. 3521-3538 ◽  
Author(s):  
K. A. Anderson ◽  
D. C. Enemark
Keyword(s):  
Auroral Zone ◽  
X Rays ◽  
Zone Ii

Time lags in the auroral zone ionosphere

1971 ◽  
Vol 19 (8) ◽  
pp. 959-969 ◽  
Author(s):  
J.S. Reid ◽  
J. Phillips
Keyword(s):  
Auroral Zone ◽  
Time Lags

scholarly journals Evaluation of the geometry of ionospheric current systems related to rapid geomagnetic variations

2004 ◽  
Vol 22 (1) ◽  
pp. 63-72 ◽  
Author(s):  
S. V. Apatenkov ◽  
V. A. Sergeev ◽  
R. Pirjola ◽  
A. Viljanen
Keyword(s):  
Dynamic Pressure ◽  
Auroral Oval ◽  
Auroral Zone ◽  
Middle Part ◽  
Magnetic Storms ◽  
Geomagnetically Induced Currents ◽  
Geomagnetic Variations ◽  
Ionospheric Current ◽  
Solar Wind Parameters ◽  
Current Systems

Abstract. To learn about the geometry and sources of the ionospheric current systems which generate strong geomagnetically induced currents, we categorize differential equivalent current systems (DEC) for events with strong dB/dt by decomposing them into the contributions of electrojet-type and vortex-type elementary systems. By solving the inverse problem we obtain amplitudes and locations of these elementary current systems. One-minute differences of the geomagnetic field values at the IMAGE magnetometer network in 1996–2000 are analysed to study the spatial distributions of large dB/dt events. The relative contributions of the two components are evaluated. In particular, we found that the majority of the strongest dB/dt events (100–1000nT/min) appear to be produced by the vortex-type current structures and most of them occur in the morning LT hours, probably caused by the Ps6 pulsation events associated with auroral omega structures. For strong dB/dt events the solar wind parameters are shifted toward strong (tens nT) southward IMF, enhanced velocity and dynamic pressure, in order for the main phase of the magnetic storms to occur. Although these events appear mostly during magnetic storms when the auroral oval greatly expands, the area of large dB/dt stays in the middle part of the auroral zone; therefore, it is connected to the processes taking part in the middle of the magnetosphere rather than in its innermost region populated by the ring current. Key words. Geomagnetism and paleomagnetism (rapid time variations) – Ionosphere (auroral ionosphere; ionospheric disturbances)

Sign in / Sign up

Export Citation Format

Share Document