磁暴现象是指（）A．磁场发生了爆炸B．磁针发生了故障，不能指

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“磁暴”现象是指（）

A．磁场发生了爆炸

B．磁针发生了故障，不能指示方向

C．因地球磁场受到来自太阳的带电粒子的扰动，使磁针不能正确指示方向

D．“磁暴”是地球本身的原因使磁场方向发生了改变

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