<p>There are parts inside the Earth (near the core) that are liquid. Presumably causing the Earth's magnetic field (though there are celestial bodies that are completely solid while they have a magnetic field around them).</p>
<p>In a comment to <a href="https://earthscience.stackexchange.com/questions/22354/can-changing-magnetic-fields-or-a-solidifying-core-cause-the-earth-to-rotate-fas">another question</a>, JeopardyTempest pointed out that solid iron and nickel (the main liquid stuff) has a density that is 15% higher than that of the liquid state. I can imagine that if this liquid stuff turns solid (though I'm not sure this will happen) this will affect the solid parts. But how?</p>

CC BY-SA 4.0
2021-06-07T09:38:23.783Z
If the liquid part turned solid, the missing magnetic field would be our least problem, because either Earth would have lost a lot of its mass, or the laws of physics would have been abolished.
Erik
CC BY-SA 4.0
2021-06-09T03:16:52.133Z
speculative fictional what if's are not a great fit for this site,
John
CC BY-SA 4.0
2021-06-09T05:10:40.690Z
This question is on topic here & depending on how it is considered it is not necessarily categorized as speculative fiction. Other planets/planetoids that once had a molten core, as Earth currently has, are now totally solid. The effect of this has been the shrinking of such planets resulting in large tectonic disruptions: faults, ridges, chasms, rifts etc. If I had the time to search for references concerning this  an answer would have been written. As to the magnetic field, it most likely would cease & atmospheric loses would most likely accelerate. Life on Earth would be totally different.
Fred
<geomagnetism><earth-rotation><crust>
If all liquid stuff inside the Earth turned solid, what would be the effect?
Deschele Schilder
# If all liquid stuff inside the Earth turned solid, what would be the effect?

(Asked by: username_0 on 2021-06-06)

There are parts inside the Earth (near the core) that are liquid. Presumably causing the Earth's magnetic field (though there are celestial bodies that are completely solid while they have a magnetic field around them).

In a comment to [another question](https://earthscience.stackexchange.com/questions/22354/can-changing-magnetic-fields-or-a-solidifying-core-cause-the-earth-to-rotate-fas), JeopardyTempest pointed out that solid iron and nickel (the main liquid stuff) has a density that is 15% higher than that of the liquid state. I can imagine that if this liquid stuff turns solid (though I'm not sure this will happen) this will affect the solid parts. But how?

**Tags:** geomagnetism, earth-rotation, crust

> **Comments:**
> **username_1**: If the liquid part turned solid, the missing magnetic field would be our least problem, because either Earth would have lost a lot of its mass, or the laws of physics would have been abolished.  
> **username_2**: speculative fictional what if's are not a great fit for this site,  
> **username_3**: This question is on topic here & depending on how it is considered it is not necessarily categorized as speculative fiction. Other planets/planetoids that once had a molten core, as Earth currently has, are now totally solid. The effect of this has been the shrinking of such planets resulting in large tectonic disruptions: faults, ridges, chasms, rifts etc. If I had the time to search for references concerning this  an answer would have been written. As to the magnetic field, it most likely would cease & atmospheric loses would most likely accelerate. Life on Earth would be totally different.  

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