The importance of space weather and its forecasting is growing as interest in studying geoeffective processes in the Sun – solar wind – magnetosphere – ionosphere coupled system is increasing. In this paper higher order statistical moments of interplanetary magnetic field and geomagnetic SYM-H index fluctuations are compared. The proper description of fluctuations in the solar wind can elucidat...

A special high-resolution routine of the EISCAT radar has been used to investigate the structure and development of the poleward wall of a deep trough in electron density. The feature was tracked by the radar during a 7-hour period under very quiet geomagnetic conditions. The ®eld-aligned nature of the structure enabled an estimate to be made of the inclination of the geomagnetic ®eld above EIS...

Understanding changes in the magnetospheric mass density during disturbed geomagnetic conditions provides valuable insight into the dynamics and structure of the environment. The mass density plays a significant role in a variety of magnetospheric processes, such as wave propagation, magnetic reconnection rates, and radiation belt dynamics. In this study, the spatial variations of total plasma ...

Measurements made from the Dynamics Explorer-2 satellite in November 1981 through January 1982 and November 1982 through January 1983 have been analyzed to determine the divergence and vertical component of vorticity of the high-latitude n utral wind field in the upper thermosphere for quiet (Kp <3) and active (3+ < Kp <6) geomagnetic conditions and for both northern (winter) and southern (summ...

A linear relationship between the hourly Dst value and the inverse of the cube of the magnetosphere subsolar distance Rs -8 from Explorer 12 satellite boundary observations has been found to exist for geomagnetically quiet times and slightly disturbed periods. The proportionality constant between the Dst and Rs -8 is found to be 1.40 times the theoretical value predicted by Mead but remains unc...

• Quiet time seasonal trend in TEC is not seen during disturbed periods of low solar activity. difference between and quiet higher the moderate The correlation day maximum with F 10.7 found to be reduced periods. present study focused understand geomagnetic storm effects on short- long-term variations ionospheric Total Electron Content (TEC) over equatorial latitude sectors. GPS-TEC observation...