The plasma sheet boundary layer and magnetospheric substorms.
نویسندگان
چکیده
منابع مشابه
Transient, small‐scale field‐aligned currents in the plasma sheet boundary layer during storm time substorms
We report on field-aligned current observations by the four Magnetospheric Multiscale (MMS) spacecraft near the plasma sheet boundary layer (PSBL) during two major substorms on 23 June 2015. Small-scale field-aligned currents were found embedded in fluctuating PSBL flux tubes near the separatrix region. We resolve, for the first time, short-lived earthward (downward) intense field-aligned curre...
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[1] We have investigated the inner equatorial plasma sheet plasma pressure evolution associated with substorm onsets using the five THEMIS spacecraft data during the 2008 tail season. The central plasma sheet thermal pressure is estimated from the thermal and magnetic pressure based on one dimensional pressure balance. The results show that for a majority of substorm cases, the plasma pressure ...
متن کاملPropagation of Alfvén Waves at the Plasma Sheet Boundary Layer
Recently, observations from the Polar and Cluster satellites have indicated that largeamplitude kinetic Alfvén waves are observed throughout the plasma sheet, particularly at the plasma sheet boundary layers, during substorms. These waves may be directly produced by reconnection processes in the tail, or indirectly through linear or nonlinear mode conversion or by localized plasma flows in the ...
متن کاملMagnetospheric Multiscale analysis of intense field-aligned Poynting flux near the Earth's plasma sheet boundary
The Magnetospheric Multiscale mission is employed to examine intense Poynting flux directed along the background magnetic field toward Earth, which reaches amplitudes of nearly 2 mW/m2. The event is located within the plasma sheet but likely near the boundary at a geocentric distance of 9 RE in association with bulk flow signatures. The fluctuations have wavelengths perpendicular to the magneti...
متن کاملProblems with mapping the auroral oval and magnetospheric substorms
Accurate mapping of the auroral oval into the equatorial plane is critical for the analysis of aurora and substorm dynamics. Comparison of ion pressure values measured at low altitudes by Defense Meteorological Satellite Program (DMSP) satellites during their crossings of the auroral oval, with plasma pressure values obtained at the equatorial plane from Time History of Events and Macroscale In...
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ژورنال
عنوان ژورنال: Journal of geomagnetism and geoelectricity
سال: 1988
ISSN: 0022-1392
DOI: 10.5636/jgg.40.157