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首页> 外文期刊>Cosmic research >Variations of the Magnetopause Position versus the Level of Geomagnetic Activity (according to Data of the INTERBALL-1 Satellite for 1995-1997)
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Variations of the Magnetopause Position versus the Level of Geomagnetic Activity (according to Data of the INTERBALL-1 Satellite for 1995-1997)

机译：磁层顶的位置相对于地磁活动水平的变化（根据1995-1997年INTERBALL-1卫星的数据）

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摘要

The variations in the deviation of the observed position of the magnetosphere boundary from its mean position predicted by the Shue at al., 1997 (Sh97) model are studied as a function of the substorm activity level (the AE-index value) and magnetic storm intensity (the value of the corrected D_(st)~* index). The results obtained make it possible to state that the amplitude of motion of the magnetospheric boundary on the dayside and in the low-latitude tail is small. It is likely that the position of the boundary is either independent of the AE and D_(st)~* indices or this dependence is weak. At the same time, the boundary of the high-latitude tail shifts inward on the average by 1.5R_E with an increase of the AE-index in the case of absence of magnetic storms (contraction of the magnetospheric tail). On the contrary, in the presence of magnetic storms, this boundary shifts outward by up to 3R_E with an increase of the AE-index (inflation of the magnetospheric tail). It is also shown that the boundary of the high-latitude tail moves outward with an increase of the D_(st)~* index, both at low substorm activity and in periods of high substorm activity. The amplitude of the outward motion of the high-latitude tail of the magnetosphere is by a factor of two higher for moderate magnetic storms with strong sub-storms than for moderate magnetic storms with weak substorms.
机译：研究了由Shue等人（1997）（Sh97）模型预测的磁层边界观测位置相对于其平均位置的偏差随亚暴活动水平（AE指数值）和磁暴的变化强度（校正后的D_（st）〜*索引的值）。所获得的结果使得有可能陈述磁层边界在白天和低纬度尾巴中的运动幅度很小。边界的位置可能与AE和D_（st）〜*指数无关，或者这种依赖性很弱。同时，在没有磁暴（磁层尾部收缩）的情况下，随着AE指数的增加，高纬度尾部的边界平均向内移动1.5R_E。相反，在存在电磁风暴的情况下，该边界随着AE指数（磁层尾部的膨胀）的增加而向外移动最多3R_E。研究还表明，无论是在亚暴活动低下还是在亚暴活动高发期，高纬度尾部的边界都随着D_（st）〜*指数的增加而向外移动。对于强副风暴的中度磁暴，磁层高纬度尾部向外运动的幅度要比弱副风暴的中度磁暴高两倍。

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