Because the moment of inertia changes. That is why spinning ice skaters' angular velocity increases when they bring their arms and legs inward toward the axis of rotation.
And with that question, I was just trying to get an idea about the forces and factors involved: external vs internal ones. I was focused on the grounding effect of sol's companion, which reduces spin frequency, as Pierre explained in his book "Earth Changes":
A grounding effect from the companion can make the Earth more spherical and, according to physics 101, in this case the rotation of the Earth could speed up because of angular momentum. And the Cs answered :
(Gaby) When we asked in August 2022 why was the rotation speed of the Earth recently increased by almost 1.6 milliseconds and you responded 'Grounding of the current!', could this mean that the Earth is now more spherical or less "wide" at the equator?
[...]
(L) Okay. Anyway, the question is again, does this mean that the Earth is now more spherical or less wide at the equator?
A: Not sufficient increase for that to happen.
So I took that as meaning that the increase in Earth's rotation was due to multiple factors, of which the releasing of heat from the inner core could well be a main player right now. And for all we know, this inner core dynamic is related to the comet swarm cycle. Earth is opening up just in time for their arrival, so to speak.
Essentially, TES states:
Recent climate change may originate from structural and exothermic phase changes in the nickel-iron core of the Earth, and not primarily from man's activity alone. Lattice structure (phase) changes in sloughed (shed) core material releases latent kinetic energy (heat) which flows to the...
theethicalskeptic.com
Earth’s core undergoes extreme exothermic change – sloughing high-latent-energy hexagonal closepack (HCP or ε-iron) iron from the inner to outer core—and by equilibrium from its D” layer into the lower mantle—where it converts to liquid face centered cubic (FCC/BCC) iron plus kinetic energy (latent heat of phase transition). The outer core Geomagnetic Current-Ring weakens and Earth’s geomagnetic dipole wanders as a result. Earth’s rotation speeds up on a decadal basis from the loss in magnetic coupling from outer core to mantle. Earth’s rotational axial geographic location also changes.
We can see that the
South Atlantic Anomaly is getting bigger, and the northern magnetic pole is moving towards Siberia, which in the past has been a first step:
Exothermic Core-Mantle Decoupling - Dzhanibekov Oscillation (ECDO) theory is a series of hypotheses regarding climate change and its relationship to the Earth's core, as well as both the evidence and mythology surrounding global cataclysms. It is solely the work of its author, The Ethical...
theethicalskeptic.com
Note as well that the Laschamp excursion from State 1 to State 2 [when there was forensic evidence of true polar wander event in the past circa 40000 BC] initiated with a change in geomagnetic pole geographic location, starting from Canada and moving into Russia, a pattern that also began for our modern era in 1973.
It's not black and white, as there was a significant decrease in Earth's rotation until not too long ago. Without even considering sol's companion, heat pouring out into the mantle can also explain it:
Our pace of addition in leap seconds (red line in the graph above) currently is many times faster than the Earth could sustain inside its angular momentum epochally. Had the Earth been slowing at this fast a pace throughout its eons of history, the planet would have come to a rotational halt by now. So we are obviously exiting (since 1972) a kind of uber-slowing phase of outer rotational body angular velocity. In Exhibit 6C to the right, one can see the simple principle that, when the core of the Earth, which spins separately from the outer rotational body of the Earth, passes mass to the outer rotational body – that outer body slows down in its rotation (angular velocity slows, while angular momentum is conserved) – and the inner body consequently speeds up.
57 Ergo, the Earth rotates at a slower pace versus the sidereal day, as we have been for the last 50 years. The result of this is much akin to when
a spinning ice skater extends their arms, and thereby slows the angular velocity of their rotation – mass added to the extremity of a rotating body serves to slow the rotation of that spinning body. That mass is being handed from the outer core of the Earth and into its lower mantle, outside of an excluding a series of Ultralow Velocity Zone (ULVZ) and Large Low-Velocity Province (LLVP) upwelled structures (core ‘sloughing mountains’) which become part of the separate outer rotational body.
In short, several major important factors are involved and have been for a while, which seem to be coming to some sort of denouement.
There's even
a study showing how a database detected significant geomagnetic field changes as early as the fall of the Roman Empire in the 500s, coinciding with the comet(s) that brought the Roman Empire to an end [follow the line of "sint-2000" on the second graph]:
According to TES, the above study is
is akin to estimating the ten-minute-interval speed of a car during a 10-day trip, with a standard deviation-based confidence band ranging from 10 to 110 miles per hour and a discrimination interval of half a day, from sampling only conducted while the car was on two-lane roads, and only by means of an agreement between tire and wind noise (no speedometer). Based on this type of analytical approach, the car would never exceeded the speed limit and never stop even once for gas, fuel, or restroom.
I'm just baffled by the entire thing and how the PTB are keeping us in the dark except for the data that can't be ignored, which is piling up.
TES has a track record of reflecting the medical experience that I was witnessing after the COVID-19 era in his graphs, before studies get published. So that's why I'm taking a look, and then when you see all this data published in hard-core journals and no "influencer" talking about it, it just makes you wonder.