>>509425467
There were, however, some who sought the slowing down of Earth's rotation on the dates discussed above as due to something other than an electromagnetic effect.
According to some the, "current thinking is that (the) Danjon effect is due to solar irradiance in the ultraviolet expanding the atmosphere which increases the moment of inertia and slows the rotation.
But, as it had been earlier pointed out, an electric charge, as in solar flares, is more likely to do the job.
This is evidenced by the fact that an electric charge placed on a rotating flywheel will increase its polar moment of inertia.
A similar, but more powerful, charge placed on Earth would therefore also increase its polar moment of inertia.
But, because of the conservation of angular momentum, this increase has to be accompanied by a decrease in the angular velocity of rotation.
How, then, would Earth return to its previous rate of spin?
If the Earth's customary burden of charge reflects the requirements of its customary environment (as at present), any excess charge acquired during an extraordinary event will presumably be dissipated into the environment rather quickly in the aftermath of that event.
The Earth must almost immediately begin to shed its excess charge, and its spin rate must increase accordingly.
When the process is completed, assuming that the environment itself has not been significantly altered by the passing event, we may expect to find that the length of the day is just about what it was before.
