During Naimittika Pralaya, after 1 kalpa when Brahma sleeps, I've read that 3 worlds (Bhu, Bhuvah, Suvah) are destroyed while higher lokas exist.
What about 7 lower lokas (Atala - Patala)? Do only 3 of them get destroyed (Atala, Vitala, Sutala), while other 4 exist?
I've read there are multiple anda-kataha, each with its own Brahma, Rudra, Indra, 14 lokas, Karya Vaikunta - basically replicas of each 'universe'. After lifetime of 'our' Brahma, during Prakrita Pralaya, our Anda gets dissolved in Prakriti.
What happens to other Andas - are all of them created/destroyed at the same time ? If not, is there anytime when absolutely no anda exists anywhere (avyaktam) ?