What is "ruaumoko"

In Māori mythology, Rūaumoko (also known as Rūamoko) is the god of earthquakes, volcanoes and seasons. He is the youngest son of Ranginui (the Sky father) and Papatūānuku (the Earth mother) (commonly called Rangi and Papa).

Ruaumoko Patera, named after this god, is one of many paterae (shallow craters) on Io, one of Jupiter's moons.