Far tail (255 RE) fast response to very weak magnetic activity

Physics – Plasma Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Space Plasma Physics: Discontinuities (2109), Space Plasma Physics: Mhd Waves And Instabilities (2149, 2752, 6050)

Scientific paper

We present an original study of the dynamical changes measured in the far tail at XGSM ≈ -255 RE, onboard STEREO-B, related to very weak substorm activity (AE < 100 nT). Three weak auroral electrojet perturbations are well correlated with motions of the far tail in which the spacecraft passes from the lobe to the boundary layer or to the magnetosheath. These boundary motions can hardly be related to a plasmoid as a widening of the tail is expected from such a high-pressure structure. Furthermore, for one of the AE enhancements, ground measurement of auroral luminosity and ground magnetic field provided a precise timing of the substorm onset, thus allowing estimation of the propagation speed of the tail disturbance, supposing it is initiated at ˜20 RE in the midtail. The computed velocity, 1800 km/s, much greater than the typical plasmoid propagation speed, implies that the tail disturbance is due to a large-scale wave propagating inside the lobe, initiated inside the inner plasma sheet at substorm onset and linked to current disruption and/or magnetic reconnection.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Far tail (255 RE) fast response to very weak magnetic activity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Far tail (255 RE) fast response to very weak magnetic activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Far tail (255 RE) fast response to very weak magnetic activity will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-865192

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.