Earth has inner core surface property variations at 1km scale

In summary, the Wikipedia article discusses the puzzling rapid variations in properties on the surface of the inner core at scales as small as 1 km. This is contradictory to the known extremely small lateral temperature variations along the inner core boundary. The reason for this is still unknown. The technique used to observe the core at such a high resolution is also mentioned. However, there is no clear explanation for the large variations in properties and further research is needed. The articles provided for reference also touch on the topic of the inner core and its effect on the Earth as a whole.
  • #1
verdigris
119
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A Wikipedia article says:
"The surface of the inner core exhibits rapid variations in properties at scales at least as small as 1 km. This is puzzling, since lateral temperature variations along the inner core boundary are known to be extremely small (this conclusion is confidently constrained by magnetic field observations)."

Why do small temperature variations correspond with relatively large variations in the properties? What is the explanation for this?
 
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  • #2
"relatively large variations in the properties"

what properties and what is large ?
 
  • #3
What technique do they use to look at the core which has a resolution of 1km? As far as I know the best we can manage with the mantle is 100 or so.
Also, which article?
 
  • #4
Good question.Can't find anything on that.

We have

http://www.gps.caltech.edu/~dla/Commentary-doc2.pdf

Earth by the low viscosity fluid outer core and it can rotate, nod, wobble, process, oscillate, and even flip over, only loosely constrained by the surrounding shells.

That's our concern. although "process" should be "precess". The question is, what that does to the Earth as a whole.

like this:
http://earth.leeds.ac.uk/~earmdu/agu03.pdf
 
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  • #5

What is the inner core of the Earth and why is it important?

The inner core of the Earth is the solid, innermost layer of the Earth. It is primarily composed of iron and nickel, and is believed to have formed due to the Earth's intense heat and pressure. The inner core is important because it plays a crucial role in the Earth's magnetic field and overall geophysical processes.

What causes surface property variations in the inner core at a 1km scale?

The variations in surface properties of the inner core are primarily caused by the Earth's rotation and convection processes. The rotation of the Earth causes the inner core to have an elliptical shape, which leads to variations in surface properties. Additionally, the convection of molten iron and nickel within the inner core also contributes to these variations.

How do scientists study the surface properties of the inner core at a 1km scale?

Scientists use a technique called seismic tomography to study the surface properties of the inner core at a 1km scale. This involves analyzing seismic waves from earthquakes to create 3D images of the Earth's interior. By studying the travel time and intensity of these waves, scientists can determine the density and composition of the inner core.

What are the potential implications of these surface property variations in the inner core?

The surface property variations in the inner core can have significant implications for our understanding of the Earth's geophysical processes. They can also provide insights into the Earth's past and future, as well as help us better understand the formation and evolution of our planet. Additionally, these variations may also have practical applications, such as improving our ability to forecast earthquakes and other geologic events.

Are there any ongoing research or studies about the surface properties of the inner core?

Yes, there is ongoing research and studies about the surface properties of the inner core. Scientists are continuously gathering new data and using advanced technologies to better understand the inner core and its variations at a 1km scale. This research is crucial in expanding our knowledge of the Earth and its processes, and can also have practical applications for various industries and fields of study.

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