- Limit of the Earth’s magnetic field in the direction of the Sun, where it interacts with the Solar Wind. The magnetopause is not a thin line but a layer of variable thickness. Its distance from the Earth varies with the amount of activity on the surface of the Sun, coming closer when the Sun’s output of charged particles increases.
- The region in space where the magnetosphere meets the solar wind. That is, it occurs where the earth's magnetic field balances the pressure of the solar wind.
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