Abstract

The correlation of the variations in geomagnetic cutoff rigidity of cosmic rays ΔR with the interplanetary medium parameters and geomagnetic activity indices Dst and Kp was calculated for different phases of the superstorm on November 7–8, 2004. The strongest correlation was observed between the cutoff rigidity and Dst at all stages of storm development (correlation coefficients k ≈ 0.70–0.98); some stable influence of the solar wind (SW) density N (k ≈ 0.50–0.80) should also be noted. The dependence of the cutoff-rigidity variation on all of the dynamic parameters of the SW is observed in the main storm phase and is especially strong for the density N and pressure P. The correlation between ΔR and V is negative in all phases, while the correlation of ΔR with N and P is positive during the main phase and negative in the recovery phase. The cutoff-rigidity variations showed no sensitivity to the Bz component of the interplanetary magnetic field (IMF), the azimuthal component By, or the IMF absolute value B before the storm or in its main phase. A significant correlation or anticorrelation of ΔR with B and all the IMF components is observed only in the recovery period. The specific response of the geomagnetic cutoff rigidity to the heliospheric and magnetospheric parameters at different phases of the magnetic storm is apparently determined by the different relative contributions of the magnetospheric global current systems during these periods.

中文翻译：

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2004年11月电磁风暴不同阶段的宇宙射线截止刚度与日球和地磁活动参数的相关性

摘要

计算了2004年11月7日至8日超级风暴不同阶段的宇宙射线ΔR的地磁截止刚度变化与行星际介质参数以及地磁活动指数Dst和Kp的相关性。刚性和Dst的在风暴发展的所有阶段（相关系数ķ ≈0.70-0.98）; 太阳风（SW）密度的一些稳定影响Ñ（ķ ≈0.50-0.80）还应当指出的。在主风暴阶段观测到临界刚度变化对西南半球所有动态参数的依赖性，特别是对于密度N和压力P。在所有阶段，ΔR和V的相关性均为负，而在主阶段，ΔR与N和P的相关性为正，在恢复阶段为负。截止刚度变化对暴风雨前或在主相位时对星际磁场（IMF）的Bz分量，方位角分量By或IMF绝对值B不敏感。ΔR与B的显着相关或反相关而且所有IMF组成部分都只能在恢复期内观察到。地磁截止刚度在磁暴不同阶段对日球和磁层参数的具体响应显然是由在这些时期磁层全球电流系统的不同相对贡献所决定的。