Publication Date:
2016-06-08
Description:
Magnetic holes (MHs), characteristic structures where the magnetic field magnitude decreases significantly, have been frequently observed in space plasmas. Particularly, small size magnetic holes (SSMHs) which the scale is less than or close to the proton gyroradius are recently detected in the magnetospheric plasma sheet. In this study of Cluster observations, by the timing method, the minimum directional difference (MDD) method, and the spatio-temporal difference (STD) method, we obtain the propagation velocity of SSMHs in the plasma flow frame. Furthermore, based on electron magnetohydrodynamics (EMHD) theory we calculate the velocity, width and depth of the electron solitary wave and compare it to SSMH observations. The result shows a good accord between the theory and the observation.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
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