The Namazu is a giant catfish in Japanese mythology that is thought to be the cause of earthquakes. It is said that the Namazu lives in the mud under the islands of Japan. Kashima (Takemikazuchi) is the Japanese god of thunder and is also the one guarding the Namazu. Kashima does this with a stone. However, when Kashima lets his guard fall, Namazu violently shakes about, resulting in earthquakes. Namazu can also be associated with good luck or fortune because when an earthquake occurs, it gives the poor a chance to start again in the quick chaos that follows. Modern-day, catfishes are used as a symbol for things such as warning signs and is used in early earthquake warnings.
The scientific explanation behind earthquakes is that when a tectonic plate suddenly slips, it causes the area near it to shake momentarily. As the lower mantle it heated up by the outer core, it becomes less dense and rises up. However, as it rises further up, it cools back down and creates a dip. This is known as convection currents and is to the cause as to why the plate tectonics move.
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