This is the first episode of the Max Fleischer Superman series in 1941. I love the visual style.
Deep in the jungle, a tribe of aboriginal warriors is having a celebration. Their leader is a tall man in a white cloak. Secretly, he’s really a Nazi commander, and the tribe’s sacred temple is really an underground Nazi outpost.
Superman must stop a madman from destroying Manhattan with electronically controlled earthquakes.
A mad scientist creates a giant magnet that brings celestial bodies down from the sky. The police try to destroy it just as he is in the process of bringing down a comet. This causes the comet to spin out of control and threaten to destroy the earth! Superman comes to the rescue.