Understanding Earth's N/S Poles: Magnetic, Geographic, Geomagnetic, & Dip

In summary, there are four different types of poles referenced in physics: magnetic N/S, geographic N/S, geomagnetic N/S, and dip N/S. The Earth's magnetic north pole is referred to as a "north" pole because it is located in the north, even though it is technically a magnetic south pole. This can lead to confusion, but it is named this way due to the convention of calling a magnet's north pole a "north" pole.
  • #1
transmini
81
1
In reading my physics book, there was mention of different types of poles. I was hoping someone could explain the differences and possibly supply a visual representation of the poles with respect to each other as to where they lie on Earth. The different poles were the magnetic N/S, geographic N/S, geomagnetic N/S, and dip N/S.

Also, going simpler, is Earth's geographic north, located near the magnetic north or south pole? I've seen both, like, mention of Earth's north pole, actually being a south pole, yet we still call it magnetic north. I don't quite understand that, at least why we call it magnetic north when its actually a south pole.
 
Physics news on Phys.org
  • #2
transmini said:
Also, going simpler, is Earth's geographic north, located near the magnetic north or south pole? I've seen both, like, mention of Earth's north pole, actually being a south pole, yet we still call it magnetic north. I don't quite understand that, at least why we call it magnetic north when its actually a south pole.
We call the Earth's magnetic north pole a "north" pole because it is located in the north. We call a magnet's north pole a "north" pole because, if allowed to rotate freely in a horizontal plane, it will point northward.

Opposite poles attract. So the Earth's "north" pole is a magnetic south pole.
 
  • Like
Likes DrClaude
  • #3
jbriggs444 said:
We call the Earth's magnetic north pole a "north" pole because it is located in the north. We call a magnet's north pole a "north" pole because, if allowed to rotate freely in a horizontal plane, it will point northward.

Opposite poles attract. So the Earth's "north" pole is a magnetic south pole.

That just seems like it leads to unnecessary confusion. I feel it'd make more sense just to call our north magnetic pole a south magnetic pole since that's what by definition it is. Thanks for an explanation though.
 

1. What is the difference between the magnetic and geographic poles?

The magnetic pole is the location on Earth's surface where the planet's magnetic field lines are vertical. The geographic pole, on the other hand, is the point where the Earth's axis of rotation intersects the surface. This means that the geographic poles are fixed, while the magnetic poles can shift due to changes in the Earth's magnetic field.

2. What is the significance of the Earth's magnetic field?

The Earth's magnetic field is essential for life on our planet. It acts as a shield, protecting us from harmful solar radiation and cosmic rays. It also plays a crucial role in navigation, as it allows animals and humans to sense direction and aids in the functioning of many technological devices.

3. How does the Earth's magnetic field affect the auroras?

The Earth's magnetic field is responsible for the auroras, also known as the Northern and Southern Lights. When charged particles from the Sun, also known as solar wind, enter the Earth's atmosphere, they interact with the magnetic field and create the beautiful light displays we see in the polar regions.

4. Can the Earth's magnetic poles flip?

Yes, the Earth's magnetic poles have flipped in the past and will likely do so again in the future. This process, called a magnetic reversal, can take thousands of years to complete. During a reversal, the magnetic field weakens, and the poles may even wander before settling in a new location.

5. How do scientists measure the Earth's magnetic field?

Scientists use a device called a magnetometer to measure the Earth's magnetic field. This instrument can detect the strength and direction of the magnetic field at a specific location on the Earth's surface. Magnetometers are also used to map the Earth's magnetic field and track changes over time.

Similar threads

Replies
6
Views
642
  • Astronomy and Astrophysics
Replies
3
Views
1K
  • Electromagnetism
Replies
13
Views
2K
  • Electromagnetism
Replies
3
Views
1K
  • Introductory Physics Homework Help
2
Replies
40
Views
914
  • Electromagnetism
Replies
7
Views
12K
Replies
5
Views
1K
  • Quantum Physics
Replies
12
Views
1K
  • Electromagnetism
Replies
6
Views
2K
  • Electromagnetism
Replies
1
Views
1K
Back
Top