The entire change in the rate of earth’s rotation since 1820 is about 0.002 seconds per day, or two entire milliseconds. A slowing of one or two milliseconds per day in the span of a year would be unprecedented.
The slowing is caused by transfer of angular momentum from earth’s rotation to the moon’s orbit (lengthening the period of a lunar month as well). The average rate of energy transfer is about one gigawatt. So a one millisecond change in the earth’s rotation rate would require about a gigawatt-century of energy.
Short term fluctuations are mostly attributed to swapping of angular momentum between the earth’s mantle and core.
How do they measure the rotation down to milliseconds? What reference do they use since everything in the solar system is moving?
Somehow I doubt the day has increased by 2-3 minutes since 1820. Even a change of .3 seconds in that time period seems rather high.
if we had the rotors turned, would the reduction in vibration help?
And I am thinking that ol’ Rog n Becky got some rotation of there own goin’ on.