Mercury Has A Significant
Mercury possesses a strong, and reportedly worldwide, magnetic field despite its modest size and slow 59-day revolution. Mariner 10 data indicate that it has a strength that is roughly 1.1% that of Earth. At Mercury's equator, the magnetic field is around 300 nT strong. Mercury's magnetic field is dipolar, just like Earth's. Mercury's poles, in contrast to Earth's, are almost parallel to the planet's spin axis.
Similar to how the magnetic field on Earth is created, it is possible that this magnetic field is produced by a dynamo effect. The planet's liquid core, which contains a lot of iron, would circulate as a result of this dynamo effect. The planet's high orbital eccentricity would work to retain a portion of the core in the liquid state required for this dynamo effect. These effects would be particularly significant tidal heating impacts.
Mercury has a magnetosphere because its magnetic field is powerful enough to divert solar wind away from the planet. The planet's magnetosphere is powerful enough to capture solar wind plasma while being small enough to fit within Earth. This adds to the planet's surface being weathered by space.
