The magnetic field is about 1.1% as strong as Earth's.[1] At the Hermean equator, the relative strength of the magnetic field is around 300 nT, which is weaker than that of Jupiter's moon Ganymede.[14] Mercury's magnetic field is weaker than Earth's because its core had cooled and solidified more quickly than Earth's.[15] Although Mercury's magnetic field is much weaker than Earth's magnetic field, it is still strong enough to deflect the solar wind, inducing a magnetosphere.