As we all know there is a huge molten core in the center of our planet. Lets take a look what will happen if this core starts to lose heat.

![](https://steemitimages.com/DQmUK5wTGTHBHZ3JZq487jm7GmUJJjC34RSX2snTpP7pqE1/image.png)


#### Magnetic Field

<center>![](https://steemitimages.com/DQmX4TsMDLuTnpXk1KSAvB1BuveC1RoqYbFe5cBpambkDT1/image.png)</center>


Worlds magnetic field protects earth from the explosions in the sun and it acts like a magnetic armor. Unlike what people thinking there aren't flames in the core of the earth. Instead it has a solid inner core of about 1200 km in diameter and a liquid inner core around it. The main raw material formed this inner core is **Iron**. Oh yeah and iron is a good conductive for electricity. The liquid part is subjected to the [Coriolis effect](https://en.wikipedia.org/wiki/Coriolis_force) because it is turning due to the movement of the earth.


![](https://steemitimages.com/DQmUYBjdcFNAYLuuU4ETZQ9ZqCj2HZMaprUjfzkFiWSz7dx/image.png)


#### What forms Magnetic Field ?


<center>![](https://steemitimages.com/DQmX4TsMDLuTnpXk1KSAvB1BuveC1RoqYbFe5cBpambkDT1/image.png)</center>

The iron is pretty conductive in plasma state , therefore because of this circular movement it also creates a circular current. As we can clearly understand from [Amper Law](https://en.wikipedia.org/wiki/Amp%C3%A8re%27s_circuital_law) 
this circular current creates a magnetic field in the direction of the rotation of the plasma. Since the divergence of the magnetic field is also zero, these magnetic field lines form a shield to make the magnetic field zero.

However the energy of world core is decreasing  according to magnetic induction equation. The magnetic field decreases because of difusion and in order to avoid this solid core transfers heat to liquid core to balance it.


So there are 3 main things for a star or planet to create magnetic field.

-  It is necessary to rotate around itself so that coriolis effect can occur.

- An electrically conductive fluid needs to be the inner core so that the magnetic field can be generated due to the coriolis effect and the rotation around it.

- The solid inner core needs to feed liquid inner core to balance the magnetic field lost with diffusion.



#### Doomsday Scenario

<center>![](https://steemitimages.com/DQmX4TsMDLuTnpXk1KSAvB1BuveC1RoqYbFe5cBpambkDT1/image.png)</center>


In this utopic scenario , if the inner solid core doesn't feed inner liquid core with head the magnetic field is going to fade in time and magnetic field won't shield us from sun. Obviously the entire life in the world is going to vanish. However if something goes wrong it will take 10.000 years to see it is deathly affect.

However if we lose solid inner core and liquid inner core magnetic field will vanish instantly and we will probably die from radiation pretty fast


#### Sources

<hr>

**Images** : [1](http://ichef.bbci.co.uk/wwfeatures/wm/live/1280_640/images/live/p0/2z/jf/p02zjf7m.jpg) , [2](https://thumb1.shutterstock.com/display_pic_with_logo/4069291/461613400/stock-vector-earth-structure-with-lithosphere-and-continental-crust-earth-mantle-and-earth-core-vector-461613400.jpg)


- https://en.wikipedia.org/wiki/Coriolis_force

- http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html

- https://en.wikipedia.org/wiki/Taylor_column

<center>![](https://steemitimages.com/DQmai3tXCwTQWsfJc1gePfg7rZpza4LBiXrkeGjajKv1Wz9/image.png)</center>


#### <center>Thanks for Reading & Hasta La Vista !</center>