Godzilla Earth is not a fanfic. It has its own official production and creative process, distinct from fan-created works. It's a legitimate entry in the Godzilla canon.
There were a few novels about the hollow earth that could be recommended. First of all," 9,000 Meters Underground " was a suspense-adventure survival novel by Ant Mengmeng. The storyline described that the interior of the Earth was hollow. As long as one found a special passage, they could enter the mysterious core world. In addition," The Underground Journey of Niels Kerim " was also a science fiction novel that used the concept of " hollow earth." Due to its popularity in Europe, it was translated into many languages, and the concept of " hollow earth " and " underground civilization " began to spread. In addition, there was also the novel " Hollow Earth " written by Kamal. It was about a second-year student who accidentally entered the Earth's interior while traveling and discovered that the Earth was hollow and had a glorious civilization. These novels could be recommended as descriptions of the hollow earth.
Fiction. There is no scientific evidence to support the existence of a hollow earth. Modern seismology, for example, shows that the earth has a solid inner core, a liquid outer core, a mantle, and a crust. These layers are well - studied through various methods like earthquake wave analysis. The idea of a hollow earth is more of a science - fiction concept that has no basis in real geological knowledge.
It's fiction. There is no scientific evidence to support the idea of a hollow earth. Modern seismology, for example, shows that the Earth has a solid inner core, a liquid outer core, a thick mantle, and a crust. All the data from deep - earth studies indicate a solid, layered structure rather than a hollow one.
Seismic evidence. Earthquake waves travel through the Earth in ways that are only possible if the Earth has a solid - like structure. For instance, P - waves and S - waves behave in specific ways when they encounter different layers of the Earth. If the Earth were hollow, these wave patterns would be completely different.
One of the well - known works in hollow earth fiction is 'Journey to the Center of the Earth' by Jules Verne. It takes readers on an exciting adventure deep into the Earth.
Adventure is a major theme. Characters in these books often embark on dangerous and exciting journeys into the hollow earth. For example, in 'At the Earth's Core', the protagonists face numerous challenges as they explore the strange inner world.
Edgar Rice Burroughs' 'At the Earth's Core' is also great. It features an interesting premise where the hero discovers a hidden world inside the Earth. The story is filled with action, including battles and exploration of this unique inner - world society.
I'm not sure specifically who the main characters are without reading the novel, but they could be scientists trying to study the black hole and its effects on Earth.