The Spiritual Science Research Foundation (SSRF) states that ghosts reside in Bhuvarlok, or the Nether” region; Patal, or the Hell region; and Bhulok, or the Earth region. According to the SSRF, ghosts include negative energies, devils, demons and more.
The regions that ghosts occupy vary and depend on the capabilities and spiritual powers of the ghost. Ghosts who experience or who have an increase in spiritual power become more subtle, which means that they are found in a deeper type of negative region, associated with the Patal region of Hell. Ghosts who possess very little spiritual power are generally found in Nether regions.