Two-dimensional structure of auroral poleward boundary intensifications

Pi2 pulsations associated with poleward boundary intensifications during the absence of substorms

[1] Pi2 pulsations during the intervals of extremely quiet geomagnetic conditions (Kp = 0) have been reported by Sutcliffe and Lyons [2002]. These authors observed that several Pi2 bursts occurred simultaneously at high (magnetic latitude = 71 ) and low (42 ) latitudes during the absence of magnetospheric substorms and found that the bursts are strongly correlated with poleward boundary intensi...

Magnetic local time variation and scaling of poleward auroral boundary dynamics

The balance of dayside and nightside reconnection processes within the Earth’s magnetosphere and its effect on the amount of open magnetic flux threading the ionosphere is well understood in terms of the expanding-contracting polar cap model. However, the nature and character of the consequential fluctuations in the polar cap boundary are poorly understood. By using the poleward auroral luminos...

Time development of field‐aligned currents, potential drops, and plasma associated with an auroral poleward boundary intensification

[1] We present a detailed case study of the plasma and fields measured by the Cluster spacecraft fleet at the high‐altitude auroral zone (∼3.5 RE) across the plasma sheet boundary layer and into the polar cap. This event, which occurred during quiet geomagnetic conditions (Kp = 1, AE = 50 nT), is of particular interest in that Cluster provides measurements at key instances during the time devel...

Application of the Boundary Element Method to two Dimensional Dynamic Problems of Saturated Porous Media

Application of the Boundary Element Method to two Dimensional Dynamic Problems of Saturated Porous Media