Oh, if the Earth's core stops spinning, the electromagnetic field will no longer protect us from harmful particles. I guess, if the solar wind has full access to our atmosphere, it could blow it away over time, and that decreased atmosphere could increase the lifespan of ballistics that enter Earth's atmosphere, which equates to far more impacts. For example, the Earth's moon without an atmosphere is impacted far more than Earth is.<br /><br />I would be curious if gravity oscillations are indicative of speed, velocity, momentum changes within the Earth's core. I know that there is a gravity experiment currently under way as we speak, but gravity oscillations will take many years to weed out, predict, and attribute to some cause, like a slower spinning core.<br /><br />That is a very good question!