The reason why there is a whirlpool in the seas is simple.
The tectonic plate beneath the ocean bed came apart forming a huge gap in the bottom, boiling magma poured out but extinguished by the massive amount of water which then rushed down to the abyss
It went down so quickly that the overall water level fell in matters of seconds.
She thought to herself that if Death Monarch did not use his power to calm down the disaster all over the world, then the casualties and the disaster would be even worse.
Fortunately, that the world expansion did not only affect Earth.
If Earth is the only planet that expanded and growing larger with the others did not, then what would happen would be that one day.
It would not be an impossibility for Earth to collide with the Moon and the other planets in the solar system before finally being attracted by the gravitational field of the sun and colliding with the sun itself.