sheath (Vivara) was, according to the Skanda Purana, located in Prabhasa.
Bali, the king of Asuras (a term also applied to the Nagas), who
performed the ten asvamedhas (horse sacrifices), was forced to withdraw into Patala,
where he thereafter ruled.
Somanatha is also referred to as the Kalagni form of Shiva.
The famous Linga of Shiva, known as Hatakeshvara in Saurashtra also came from Patala. One
of the names of Shiva is also Vadavamukha.
It can, therefore, be concluded that Shiva, as the Lord of
Destruction, was at one time, identified with the God of Fire in Prabhasa, a tradition
clearly indicative of some geological action.