Factual error: With the radiation belt on fire, the icecaps begin to melt. The Seaview is bombarded by huge chucks of ice. The ice is sinking to the bottom like stones. Ice floats, it doesn't sink.
The supersub Seaview in the Arctic, is pummeled underwater by falling iceburg sections. Admiral Nelson (Walter Pigeon)& Capt Crane (Robert Sterling) discover the sky in flames, & learn the Van Allen radiation belt has caught fire. Before heading to a UN conference, they pick up a lone scientist, Alvarez (Michael Ansara). Watching for crew stress is civilian psychologist Dr Hillery (Joan Fontaine). At the UN, Adm Nelson & Commodore Emery's (Peter Lorre) plan to save the earth is rejected. The Seaview encounters a mine field, giant squid & persuing subs, head to the Pacific, to fire a special missle. Alvarez & Hilliard each have separate ideas to stop Adm Nelson & his plan.