The solar wind, which carries the particles from the sun's magnetic field, known as the interplanetary magnetic field, takes about three or four days to reach the Earth.
太阳风将粒子从太阳的磁场，也就是我们通常所说的行星际磁场中带出，经过三至四天的时间到达地球。
2
Convection in the magnetosphere and ionosphere can be strongly driven by these fluctuations, independent of the direction of the interplanetary magnetic field.
磁气圈和电离层之间的能量传递可以靠磁场的变化产生的强大的推动力，而不一定要依赖于行星际磁场方向。
3
The interplanetary magnetic field fluctuates greatly in magnitude and direction.