Reconnection is most efficient when the IMF has a component that is directed southward—that is, opposite to the northward direction of the earth's magnetic field at the dayside of the magnetosphere.
Reconnection is most efficient when the IMF has a component that is directed southward—that is, opposite to the northward direction of the earth's magnetic field at the dayside of the magnetosphere.
在磁层昼侧，若IMF有南向分量，也就是和北向的地球磁场方向相反，则磁力线重连的效率最高。