Believe it or not you will find most of it in earthquake research. If you look up anything about the earths core like you normally would you will get nothing but picture A. When you start looking into earthquake mapping is where you get the truth. There are other ways that match this but they are extremely formula based so if you are good at that than you can look at solar conductivity and earth core reactions. I am sure there are videos on youtube about this also. These photos which I ignorantly forgot to credit are from a channel called Suspicious Observers. It is a great channel but may contain info you really don't want to know. Proceed with caution.

thanks mate.