A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region

Details A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1008m&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 108, Issue A1, pp. SMP 6-1, CiteID 1008, DOI 10.1029/2002JA009265

Physics

3

Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions

Scientific paper

Intense low-frequency (0.2 Hz-4.0 Hz) electric field fluctuations are frequently observed over the dayside auroral region. We studied the statistical properties of the spatial occurrence of the intense fluctuations and their dependence on interplanetary conditions based on electric field observations from the polar-orbiting Akebono (Exos-D) satellite. We found that the intense fluctuations are most frequently observed around the prenoon cusp/cleft region at low altitude (5000 km-8000 km) and that the intensity of the fluctuations tends to decrease with increasing altitude, which is less evident on the afternoon oval. The occurrence of the intense fluctuations depends on the spiral angle of the interplanetary magnetic field and on the solar wind velocity. The fluctuations are interpreted in terms of Alfvén waves centered on the cusp/cleft region penetrating down to lower altitude without any significant dissipation and quasi-static structures associated with parallel potential drops decoupling the intense high-altitude electric fields from the ionosphere in the afternoon region of the auroral oval.

Affiliated with

Also associated with

No associations

Rating

A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region 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 A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A statistical survey of low-frequency electric field fluctuations around the dayside cusp/cleft region will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1529970