Magohalmi, or Grandmother Mago, is the Great Earth Mother Goddess, who is believed to have carried out all the geographical formations at the beginning of the universe.
This giant goddess appears squalid but is strong, with an enormous body spanning the size of seas and mountains, capable of performing acts of creation like moving earth and rocks to change the natural landscape.
The oral tradition of Magohalmi is observed around the country in various versions, each called by a different title: Seolmundaehalmang (Grandmother Seolmundae) on Jeju Island; Gaeyanghalmi (Grandmother Gaeyang) on the western coast; Seoguhalmi (Grandmother Seogu) in Gangwon Province; and Angadakhalmi (Grandmother Angadak) of Gyeongsang Province. In Suseong Shrine of Buan, North Jeolla Province, Grandmother Gaeyang is enshrined, along with her eight daughters, as a guardian goddess of fishermen. In Haesindang (Sea God Shrine) of Port Danggae in Seogwipo, Jeju Island, Seolmundaehalmang is enshrined as a village goddess, and shamanic songs sung as part of mountain god rituals (sansinje) include lyrics about the goddess, which serve as evidence of the goddess’s deification.