The Eight Cold Hells
Arbuda-naraka — the hell of blisters.
Nirarbuda-naraka — the hell of swollen blisters.
Atata-naraka — the hell where one shivers from cold.
Hahava-naraka — the hell of weeping and wailing.
Huhuva-naraka — the hell of chattering teeth.
Utpala-naraka — the hell of the blue lotus.
Padma-naraka — the lotus hell.
Mahāpadma-naraka — the great lotus hell.
The stay in each subsequent hell is 20 times longer than in the previous one.
The Eight Hot Hells
Sañjīva-naraka — the hell of revival. The stay in this hell lasts 1.62 × 1012 years. Kālasūtra-naraka — the hell of black threads (cutting lines). The stay in this hell lasts 12.96 × 1012 years.
Saṅghāta-naraka — the crushing hell. The stay in this hell lasts 103.68 × 1012 years. Raurava-naraka — the hell of screams. Life in this hell lasts 829.44 × 1012 years. Mahāraurava-naraka — the hell of great screams. Life in this hell lasts 6,635.52 × 1012 years.
Tāpana-naraka — the hot hell. Life in this hell lasts 53,084.16 × 1012 years. Pratāpana-naraka — the hell of intense heat. The stay in this hell lasts 424,673.28 × 1012 years.
Avīci-naraka — the uninterrupted hell. The stay in this hell lasts 3,397,386.24 × 1012 years, until the end of the antarakalpa.
The Foundation of the Earth
At the center of the Earth stands Mount Sumeru, with a height of 80,000 yojanas — the same as the depth of the surrounding ocean. Below it lies the “golden earth,” a sufficiently firm substance capable of supporting the weight of Mount Sumeru. Its depth is 320,000 yojanas. The golden earth rests upon water 8,000,000 yojanas deep. Beneath this layer of water lies the “circle of wind,” which is 16,000,000 yojanas deep and significantly wider. This wind circle serves as the foundation for more than a thousand different worlds.”
So, as you can see, there is still a center — this is the described navel of the Earth.