Ancient Japanese had this legend that the great catfish Namazu who lived in the centre of the Earth would shake itself furiously leading to great disasters all around. A great god named Kashima who was the only one who could control and contain Namazu pinned the catfish against a rock. They said that whenever Kashimas mind lingered elsewhere, Namazu would get loose and cause more earthquakes. This is what ancient people believed but now due to widespread advancement and technology, the real reasons of why earthquakes occur have now surfaced.
