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Questions tagged [magnetosphere]

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9
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1answer
519 views

How much water is the atmosphere losing to space?

Up until recently, I was under a (wrong) impression that the amount of planetary cumulative water resources was finite as I believed its escape from the atmosphere was impossible. I believed that, ...
11
votes
1answer
655 views

Does the magnetic field really protect Earth from anything?

Many topics discussed here in Earth Science SE, tend to be about facts that are of consensus in the scientific community but not widely accepted by the general public. Instead, this one is widely ...
8
votes
1answer
408 views

What? Northern lights are *not* simply caused by energetic charged particles from the sun?

Reading the article Northern Lights: The traditional explanation for the aurora borealis is wrong, physicist says I was surprised to find out that the simple, standard explanation for the production ...
4
votes
1answer
167 views

What is the meaning of integral of negative magnetic field (nT) over time?

I have a plot of the magnetic field (y-axis) over time (x-axis), one measure each hour (Dst - Disturbance Storm-Time). From time to time, there is a negative peak, which indicates a magnetic storm. ...
6
votes
1answer
2k views

Does Magnetic Deviation depend on altitude?

Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is positive east of true north and negative when west. Magnetic ...
43
votes
2answers
4k views

(How long) would Earth's atmosphere last without a global magnetic field?

The Earth's magnetic field provides an important protection against the solar wind (for example, see Wikipedia on Earth's magnetic field and references therein). Mars may have lost its atmosphere ...
4
votes
1answer
71 views

What causes aurorae?

I know that aurorae are caused by solar activity interacting with the Earth's magnetic field as charged particles are funneled down into the polar magnetic mirrors. On one hand, I know that as ...
8
votes
1answer
276 views

Laboratory simulation of the Earth's magnetic field

I remember reading an article where a scientist was able to make a spinning iron tube with liquid nickel inside and it created a magnetic field, providing a laboratory-scale simulation of the ...