Both Mercury and Earth have global magnetic fields. Compared to Earth, which feature is Mercury known to lack that is thought necessary for generating a STRONG field?

Question

Quizplus · Accepted Answer

Mercury has a large iron core and a partially molten outer core, similar to Earth, which are essential for generating a magnetic field. However, Mercury's slow rotation rate (58.6 Earth days to complete one rotation) compared to Earth's (24 hours) is thought to contribute to its much weaker magnetic field. Rapid rotation is believed to enhance the dynamo effect that generates a planet's magnetic field.

Both Mercury and Earth Have Global Magnetic Fields