system
Given the following post, respond as if you're commenting on Reddit:
human
Are there different types of magnetic fields?

A general compass will point towards  the magnetic north of the earth. But when an external magnet is kept near the compass, the compass will point towards the stronger magnetic field in its vicinity.

Are there different "frequencies" in magnetic fields such that the measurement of one field might not get affected by the other?
gpt
> Are there different "frequencies" in magnetic fields such that the measurement of one field might not get affected by the other?

Nope! In a sense, the universe has *one* magnetic field. While you're used to thinking about 'this magnetic field around this bar magnet' and 'this other magnetic field around this refrigerator magnet' those are really just the 'contributions' of those two magnets this one magnetic field. This is what we mean when we say magnetic fields are in a superposition- at any point in space, you feel the contributions of every magnetic thing all at once, and that information (about all the little magnetic contributions from this or that) is kept in the magnetic field. In your compass example, at no point does the second magnet and the field around it cease to exist or reach your compass, it just gets far enough away that the interaction between the compass needle and the earth's field dominates. 

It's in many ways similar to gravity. The earth or sun's gravity doesn't just stop if you go far enough away from the solar system, and your local experience is governed by whatever strong gravity source is closest to you. Electromagnetism is very different than gravity in a lot of ways, but the same general principle holds. Magnets are the same way, but for practical purposes you don't need to take into account all these contributions to the magnetic field (from the sun, or the magnets owned by a guy in Dusseldorf, or from the gas in the galaxy).