The name of the Norse apocalyptic event signifying the end of the world is Ragnarök. This prophesied event involves a series of catastrophic battles resulting in the death of numerous gods, including Odin and Thor. Ragnarök symbolizes not just destruction but also rebirth and renewal, as it leads to the creation of a new world. This event reflects themes of fate, inevitability, and the cyclical nature of existence, highlighting the Norse belief in the constant interplay between chaos and order.