Valiant Comics 1991-96

Solar #2

Second Death, Part 2: Out of my Mind – Having finally remembered that he was tossed back through time when he accidentally destroyed the Earth in a black hole, Phil must now prevent that terrible mistake from being repeated. Unable to convince Dr. Dobson to shut down the Edgewater reactor, Phil suffers a seizure and splits into two superhuman personas. When these two clash in Antarctica, most of the ice-cap is vaporised.

story continued:
Part 1 – Solar #1
Part 3 – Solar #3