I wonder how difficult it would be to create an artificial planetary magnetic field with generators? What power would they need?
The question is inspired by thinking about possible colonization of Jupiter's moons Io and Europa, which are located inside the Jovian radiation belt. Is it possible to create with easy means an artificial magnetic field such that it would shield the surfaces of these moons from radiation? Or would it require an astronomical amount of power?
By easy means I mean a device that would not require power greater than a normal industrial power plant, best of all, solar-powered or based on once-charged superconductor coils.