Has Earth’s inner core stopped its strange spin?

[Fred Bloggs]

No.

Hysterically confused MSM is repeating stories making it sound like the inner core has come to a dead halt. The geophysicists are talking about rotation relative to the mantle, obviously since they and all they're seismic wave recording instrumentation are located at fixed points on the mantle. The inner core was not "super" rotating particularly fast anyway, only gaining about 0.1 degree per year on the mantle. That is such a slight difference over such a relatively long time period, it's no wonder they can only say they "think" the inner core stopped.

https://www.nature.com/articles/d41586-023-00167-1

[John Larkin]

Could be the usual press-panicking over extrapolation of measurement
noise.

[Fred Bloggs]

They should have learned their lesson after that idiot radio broadcast pretending real time coverage of a Martian invasion.

"Welles barely had time to glance at the papers, leaving him with only a horribly vague sense of what he had done to the country. He’d heard reports of mass stampedes, of suicides, and of angered listeners threatening to shoot him on sight."

You're getting the same thing now, except they're planning civil wars and government overthrow.

https://www.smithsonianmag.com/history/infamous-war-worlds-radio-broadcast-was-magnificent-fluke-180955180/

[Anthony William Sloman]

The outer core is liquid and convects. The inner core is solid and presumably gets dragged along by the convecting fluid at it's surface.

There is going to be more than one convecting loop of fluid in the outer core, and they will be influenced by the rotation of the inner core. It's going to take a while before we get a good idea of what is actually going on, and even longer before that makes it into the main-stream media, let alone the populist nonsense that John Larkin reads.

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Bill Sloman, Sydney

[Fred Bloggs]

Article says the liquid outer core is a cauldron of turbulence caused by radioactive heating and "chemical differentiation" constantly churned by the interface boundary of inner/outer cores. Then there's some kind of gain going on with the conductive molten iron convection currents in the presence of a small permanent magnetism in the mantle producing a motional magnetic field that's somehow of greater magnitude and self-sustaining.

https://www.usgs.gov/faqs/how-does-earths-core-generate-magnetic-field


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> --
> Bill Sloman, Sydney

[Anthony William Sloman]

We all knew that.

https://escholarship.org/content/qt97s3x12h/qt97s3x12h.pdf?t=nvfp71

does say that the convection is turbulent. Calling it a cauldron of turbulence is a bit silly - a cauldron is a cooking pot and we don't take stuff out of the liquid outer core or put anything into it to get it cooked.

It does seem to be a self-exciting dynamo. in much the same way that the outer layers of the sun, are, and there aren't permanent magnets in the sun.

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Bill Sloman, Sydney