There are times when the field is northward and there are strong flows in the dayside polar ionosphere.
在磁场方向为北的情况下，电离层白昼侧的极地地区也有很强的能量传递。
2
One of the most important of these is a fluctuation in the density of electrons and other electrically-charged particles in the ionosphere.
最重要的一点是在电离层的电子和其他带电粒子的密度是波动的。
3
The researchers found that almost all of the earthquakes down to a depth of about 35km were preceded by distinct electrical disturbances in the ionosphere.