<p>I was looking through some sites and came across this - <a href="https://www.livescience.com/earth-magnetic-field.html" rel="nofollow noreferrer">https://www.livescience.com/earth-magnetic-field.html</a></p>
<p>This clearly mentions how, if the magnetosphere surrounding the Earth weakens, the Auroras might penetrate into the Atmosphere and light up the skies closer to the equator. So, I also looked it up but, to my astonishment, I found no sources that answered this question to my satisfaction.</p>
<p>Though, intuition says that If there is no Magnetosphere, there should be no Aurora either.</p>

CC BY-SA 4.0
2020-09-12T12:20:27.387Z
If anyone can confirm what exactly happens if there is absolutely 'no' Magnetosphere around the Earth?
Infinity Milestone
CC BY-SA 4.0
2020-09-12T12:18:43.017Z
2020-09-12T12:18:43.017Z
Infinity Milestone
<p>The greatest part of the Earth is protected from the Solar wind by its magnetic field. This field makes the wind particles (mainly protons and electrons) the beauty of Aurora appear.
Suppose the magnetic field wasn't present. The Solar wind particles hitting the southern and northern parts of our planet would distribute themselves over whole the Earth's surface.<br />
How would Aurora look like?<br />
For certain it would be not slowly swirling (following the slowly changing magnetic field lines). Will we see a sparkling sky? Or what?</p>
<p><a href="https://i.sstatic.net/X55ko.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/X55ko.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2020-09-10T20:01:48.397Z
It would be fairly similar to Mars. If Earth had no magnetic field, the Earth's atmosphere would be thinner, and Auroras would occur wherever the solar wind hits the atmosphere.
Star Man
CC BY-SA 4.0
2020-09-11T01:44:17.277Z
related factoid: there is an answer or two either here in Astronomy SE or in Space Exploration SE that explains why Mars (for example) still has a magnetosphere even though the planet has no intrinsic global dipole field. It comes from currents produced as the solar wind encounters the planet, forms a shock front and then flows around the planet, at least something like that. The shape of the field is of course different than a planetary dipole, but there can be one nonetheless.
uhoh
CC BY-SA 4.0
2021-08-31T14:54:59.670Z
See:  https://physics.stackexchange.com/a/335325/59023
honeste_vivere
<magnetic-field><solar-wind><solar-storm>
What would Aurora look like if no magnetic field was present around the Earth?
Deschele Schilder
# What would Aurora look like if no magnetic field was present around the Earth?

(Asked by: username_0 on 2020-09-10)

The greatest part of the Earth is protected from the Solar wind by its magnetic field. This field makes the wind particles (mainly protons and electrons) the beauty of Aurora appear.
Suppose the magnetic field wasn't present. The Solar wind particles hitting the southern and northern parts of our planet would distribute themselves over whole the Earth's surface.  
How would Aurora look like?  
For certain it would be not slowly swirling (following the slowly changing magnetic field lines). Will we see a sparkling sky? Or what?

[![enter image description here](https://i.sstatic.net/X55ko.jpg)](https://i.sstatic.net/X55ko.jpg)

**Tags:** magnetic-field, solar-wind, solar-storm
> **Comments:**
> **username_1**: It would be fairly similar to Mars. If Earth had no magnetic field, the Earth's atmosphere would be thinner, and Auroras would occur wherever the solar wind hits the atmosphere.  
> **username_2**: related factoid: there is an answer or two either here in Astronomy SE or in Space Exploration SE that explains why Mars (for example) still has a magnetosphere even though the planet has no intrinsic global dipole field. It comes from currents produced as the solar wind encounters the planet, forms a shock front and then flows around the planet, at least something like that. The shape of the field is of course different than a planetary dipole, but there can be one nonetheless.  
> **username_3**: See:  https://physics.stackexchange.com/a/335325/59023  

---

## 1 answers

### Answer by username_4 on 2020-09-12. Score: 1

I was looking through some sites and came across this - <https://www.livescience.com/earth-magnetic-field.html>

This clearly mentions how, if the magnetosphere surrounding the Earth weakens, the Auroras might penetrate into the Atmosphere and light up the skies closer to the equator. So, I also looked it up but, to my astonishment, I found no sources that answered this question to my satisfaction.

Though, intuition says that If there is no Magnetosphere, there should be no Aurora either.

> **Comments:**
> **username_4**: If anyone can confirm what exactly happens if there is absolutely 'no' Magnetosphere around the Earth?  

---

