Great Cataclysm



The Great Cataclysm was the incident that caused Atlantis to sink beneath the ocean.

This occurred about 9,600 years before the time of the Super Friends.

This incident occurred during the thirty-second year of the reign of King Thorvall, and thus; Atlantis was swallowed by the Atlantic.

Prelude
Prior to the destruction of Atlantis, some scientists foretold the coming calamity, although many scoffed at the idea. Still, Thorvall had sent out expeditionary ships to colonize other places. General Rugero led an expedition to the North Pole, where they discovered warm air currents beneath the ice. It was then they located an opening that led them inside the Earth and into a new inner world that would eventually be known as Skartaris.

It is also possible that many during this period fled the Earth altogether, as there were a number of Humanoid life forms all over the Milky Way Galaxy that resembled Humans too closely to be entirely alien races.

It's possible that Kryptonians, Rannians, Thanagarians, Orions and many other Human-looking humanoid race were actually descendants of the human beings from Pre-Cataclysm Atlantis. Still, this was never actually revealed, and might not be the case.

The Cataclysm
As previously mentioned, Atlantis sank beneath the Atlantic Ocean due to heavy tremors that caused the entire continent to sink. It is possible that this was due to something that the Time Trapper did years earlier in 59,600 B.C.

Aftermath
Although many Atlantean cities were destroyed during this disaster, some; such as Poseidonis and Tritonis, were preserved in domes. The natives of those cities also developed amphibious qualities, which allowed them to be able to survive in both the air and water.