All Questions
Tagged with earth magnetic-fields
19
questions
6
votes
2
answers
2k
views
How would the Aurora light on Earth look like if there wasn't a magnetic field?
Here are some pictures of the aurora light.
The beautiful phenomenon of Aurora is a well-known one, seen in the northern (Aurora Borealis) and southern parts (Aurora Australis) of the globe. Here is ...
7
votes
1
answer
10k
views
Why is the geomagnetic north pole at a different location from the magnetic north pole?
According to this site
Magnetic North, Geomagnetic and Magnetic Poles
The Geomagnetic poles (dipole poles) are the intersections of the Earth's surface and the axis of a bar magnet hypothetically ...
- 171
4
votes
6
answers
5k
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Why geologist do not consider molten iron in the magma to be the source of Earth's magnetic field?
This was a question that came in a exam. How come is this possible?
Actually, a question on the source of Earth's magnetic field was asked here on physics SE, which matches my opinion.
The ...
- 1,273
13
votes
1
answer
1k
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Are there necessarily always at least two points where the Earth's magnetic field is vertical?
Seeing this statement in this answer
There are at least two spots on Earth where the magnetic field of the planet is not horizontal, but is vertical.
has got me thinking. I don't mean to quote it ...
- 6,273
4
votes
2
answers
4k
views
Cancel out Earth's Magnetic field
Is there any tools except helmholtz coil to cancel out earth's magnetic field to calibrate magnetometers in practice.
- 143
4
votes
3
answers
14k
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Why does Earth behave like Natural Bar Magnet?
What is the reason for the Earth to behave like a bar magnet and have poles (North and South poles)?
- 659
14
votes
2
answers
4k
views
Does the geomagnetic field rotate?
The Earth rotates about it's own axis. Do the geomagnetic field lines rotate due to this rotation or not?
- 347
11
votes
6
answers
5k
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Are metals more heavy due to the Earth's magnetic field?
Non-metal objects are attracted to the Earth due to gravity. So the weight of non-metal objects can be only dependent on their mass.
On the other hand metals can be attracted to the Earth's magnetic ...
- 347
6
votes
2
answers
768
views
Shape of Earth's magnetic field
Why earth's magnetic field is compressed on day side and extended like tail on night side, like this
I know that it's due to solar wind but not how that compression and extension happens.
- 143
2
votes
1
answer
468
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differences of Aurora Borealis (North) vs. Aurora Australis (South)
I was wondering about the differences between the Northern vs. Southern lights: will one pole collect the positive charges, and the other the negatives? I know that the solar wind is composed mainly ...
- 21
2
votes
2
answers
428
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What is the Earth's magnetic field in space?
I have looked around a bit, but haven't found a simple answer. At an altitude between 100-1000 km,
Is the magnetic field B still around $\sim 10^{-5}\ T$? Is there a simple equation that would provide ...
1
vote
5
answers
2k
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Why does the Earth not lose its magnetism?
A magnet loses its magnetic properties when subjected to heat, the Earth's core is also hot but still it has magnetic properties, Why?
- 676
38
votes
4
answers
6k
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Why is Earth's climate so stable?
Earth wasn't always the only water-world in the solar system. Mars also appear to have started out wet
but, as conditions changed, Mars lost its oceans.
So, how has Earth managed to avoid a similar ...
- 1,139
9
votes
2
answers
2k
views
Earth's magnetic field shields us... from what threat?
This is a nice artistic picture of the magnet field of the earth, shielding us from the solar wind. (source)
Wherever you look, it is stated that without our shield, life would not be possible on ...
- 298
8
votes
3
answers
4k
views
Why does earth's magnetic field change its direction?
I know that the earth's magnetic field is due to molten metal and ions flowing in its core. It has been found that the Earth's magnetic field changes its direction and it has even flipped once!
But, ...
- 3,905