If there are minor variations in rotational speed -- and by minor I mean a few millionths of a second a day -- they will even out over time. No big deal. Could be caused by shifting mass inside the molten core. Stuff moved around inside the earth all the time.
If there are minor variations in rotational speed -- and by minor I mean a few millionths of a second a day -- they will even out over time. No big deal. Could be caused by shifting mass inside the molten core. Stuff moved around inside the earth all the time.
(post is archived)