Right now, the earth actually isn’t a sphere - it’s slightly flattened at the poles due to the spinning motion, with a bulge at the equator. Should the earth completely stop spinning, the bulge would lessen and the earth would turn into more of a proper sphere.
Since water is extremely responsive to force, the earth’s spin has pushed the oceans up higher than they would be without the rotation. So if the earth stopped spinning, the water would migrate away from the equator. Eventually the equator would be one big super-continent wrapping around the earth, so you could walk all the way around the earth on the equator and stay dry the entire time.
7. A Lot Of Things Would Get Swept Away Into The Atmosphere
NASA says that should the earth stop spinning immediately, anything not attached to bedrock would get whisked up and into the atmosphere, which would continue to spin even after the earth stops spinning. This includes trees, houses, buildings, etc.
Due to half of the earth being exposed to direct sunlight for six months straight and the other half being in complete darkness, the seasons would be much more extreme, to the extent that certain species would die out and humans would have a hard time existing.
The momentum of the oceans migrating toward the poles would likely cause massive tidal waves that would wipe major cities off the map. You wouldn’t even have time to pick up your things and get the hell out of there!
The earth stopping so suddenly would, quite literally, shake the planet to the core. There would be massive earthquakes and volcanic eruptions. We would also get winds up to 1,100 mph and potentially lose some of our atmosphere in the process!
NASA says that the earth’s spin has actually been slowing down very gradually over time, and we’ve been seeing the geological effects. Eventually, scientists predict that earth will indeed be more spherical over time.
The slowdown is estimated to continue for another 4 billion years until the earth eventually stops spinning completely. Thankfully humans don’t live for that long, so you won’t really have to worry about being completely underwater someday if you live in northern Canada!
Earth’s living conditions would be absolutely terrible once the earth stopped spinning, to the point that we humans would likely have to live underground and wear protective suits to avoid radiation exposure. And we’d only be able to exist right in between the day-and-night halves of the earth.