We (that's me and the Holy spirit) have made an extensive study of how the zones of the interior of the Earth, or levels of hell, may be deduced from Biblical Hebrew and Greek.
Hell is a Destination for Souls
Graves and Pits
One of the repercussions of the fall of man was the start of nuclear decay. This in turn is the beginning of hell, since the explosive rate of decay, concentrated in the core of the Earth, caused the core to melt.
July 8th
The reason for hell is: the temporary storage of the accumulated impurity and corruption which is inherent in creation. It's required for the purification of creation.