What makes the compass point towards the north

Category: Earth Science Published: November 15, A magnetic compass does not point to the geographic north pole. A magnetic compass points to the earth's magnetic poles, which are not the same as earth's geographic poles. Furthermore, the magnetic pole near earth's geographic north pole is actually the south magnetic pole.

When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. Magnetic field lines outside of a permanent magnet always run from the north magnetic pole to the south magnetic pole.

And making things even more difficult for the compass-wielding navigator, the magnetic North Pole isn't even a stationary point. As the Earth's magnetic field changes, the magnetic North Pole moves. Over the last century, it has shifted more than miles 1, kilometers toward Siberia, according to scientists at Oregon State University.

This difference between true north and the north heading on a compass is an angle called declination. Declination varies from place to place because the Earth's magnetic field is not uniform it dips and undulates. These local disturbances in the field can cause a compass needle to point away from both the geographic North Pole and the magnetic North Pole. When it lines up, one end of the needle points northe and the other points south. But don't expect to reach the North Pole if you travel in the direction your compass points.

The North Pole is axis around which the Earth spins. A compass points to a different North Pole: the magnetic north pole. People who use compasses know just how much to change course if they want to travel to the true north or south--or anywhere in between.

Start your day with the top stories you missed while you were sleeping. Cookie banner We use cookies and other tracking technologies to improve your browsing experience on our site, show personalized content and targeted ads, analyze site traffic, and understand where our audiences come from.

By choosing I Accept , you consent to our use of cookies and other tracking technologies. Print Subscriptions. Deseret News homepage.