parent nodes: Arrowverse | Cisco Ramon | Earth-1 | Earth-2 | Earth-38 | Earth-Prime | Earth-TUD5 | The Flash
Team Metal was transported to this world after being attacked by Kurtis Rowan. With the help of The Flash and his friend Cisco Ramon, they were able to start leaping from universe to universe, hoping to follow the omniversal blast back home.
Earth-1, name coined by Martin Stein, was a universe parallel to a plethora of others, supposedly located at the center of the multiverse. To Earth-2 citizens, or at least that Earth's Harrison Wells, Earth-1 was initially thought of as Earth-2.Grodd has referred to this universe as First Earth.[4] After a massive exodus during the Crisis, it became home to 3 billion refugees from Earth-38 after that universe was destroyed by a wave of antimatter. Shortly after, however, the antimatter wave hit Earth-1 as well, vaporizing its population and destroying the entire multiverse with no Earths remaining. It was also the final Earth to be destroyed.
After Oliver Queen died while defeating the Anti-Monitor and reformed the universe, Earth-Prime was formed, which contained most elements of Earth-1, Earth-38, and Earth-TUD5. As such, while this Earth may be physically gone, its people live on as part of Earth-Prime.
Earth-1 was particularly important in that it was a central junction in the original multiverse, being the middle intersection from which one could travel to any other alternate universe.