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Thu Jun 11, 2020, 02:15 PM

Scientists detect unexpected widespread structures near Earth's core

From phys.org:



Earthquakes, seen as yellow stars here, send sound waves through the Earth. Seismograms, seen as blue triangles here, record the echoes as those waves travel along the core-mantle boundary, diffracting and bending around dense rock structures. New research from University of Maryland provides the first broad view of these structures, revealing them to be much more widespread than previously known. Credit: Doyeon Kim/University of Maryland

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University of Maryland geophysicists analyzed thousands of recordings of seismic waves, sound waves traveling through the Earth, to identify echoes from the boundary between Earth's molten core and the solid mantle layer above it. The echoes revealed more widespread, heterogenous structures—areas of unusually dense, hot rock—at the core-mantle boundary than previously known.

Scientists are unsure of the composition of these structures, and previous studies have provided only a limited view of them. Better understanding their shape and extent can help reveal the geologic processes happening deep inside Earth. This knowledge may provide clues to the workings of plate tectonics and the evolution of our planet.

The new research provides the first comprehensive view of the core-mantle boundary over a wide area with such detailed resolution. The study was published in the June 12, 2020, issue of the journal Science.

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Arrow 15 replies Author Time Post
Reply Scientists detect unexpected widespread structures near Earth's core (Original post)
Jim__ Jun 2020 OP
Squinch Jun 2020 #1
soothsayer Jun 2020 #2
LineLineLineReply .
Squinch Jun 2020 #3
Jamastiene Jun 2020 #4
Jim__ Jun 2020 #7
patphil Jun 2020 #5
grumpyduck Jun 2020 #6
CentralMass Jun 2020 #8
grumpyduck Jun 2020 #9
SCantiGOP Jun 2020 #15
sdfernando Jun 2020 #10
Thirties Child Jun 2020 #12
cstanleytech Jun 2020 #14
EarlG Jun 2020 #11
2naSalit Jun 2020 #13

Response to Jim__ (Original post)

Thu Jun 11, 2020, 02:18 PM

1. Of course! It's where Cthulu lives!

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Response to Squinch (Reply #1)

Thu Jun 11, 2020, 02:24 PM

2. Shh, he lies dreaming, not alive and not dead

Don’t wake him.

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Response to soothsayer (Reply #2)

Thu Jun 11, 2020, 02:26 PM

3. .

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Response to Jim__ (Original post)

Thu Jun 11, 2020, 02:31 PM

4. I want to go to Colorado and watch that 3D graphic.

Far out. I wanna get stoned and watch that graphic.

Even if I didn't already love science, that 3D graphic is awesome. Props to the creator of it.

There is so much we don't know about the planet we inhabit. I love when we learn more.

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Response to Jamastiene (Reply #4)

Thu Jun 11, 2020, 02:49 PM

7. Yea, that graphic definitely caught my eye!

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Response to Jim__ (Original post)

Thu Jun 11, 2020, 02:42 PM

5. I don't like the look of that big red and yellow area.

It looks like a cancer deep in the Earth.

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Response to Jim__ (Original post)

Thu Jun 11, 2020, 02:46 PM

6. Dammit, they just gave away the location of

Antifa headquarters!

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Response to grumpyduck (Reply #6)

Thu Jun 11, 2020, 02:56 PM

8. The source of those special gravity waves that make you fall harder. ;-)

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Response to CentralMass (Reply #8)

Thu Jun 11, 2020, 02:57 PM

9. LOL!

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Response to grumpyduck (Reply #6)

Thu Jun 11, 2020, 08:38 PM

15. Antifa HQ is spread out

There’s a chapter in every bingo parlor.

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Response to Jim__ (Original post)

Thu Jun 11, 2020, 03:11 PM

10. Atlantis? /NT

Yeah, I know...wrong ocean....Pacificus???

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Response to sdfernando (Reply #10)

Thu Jun 11, 2020, 03:37 PM

12. Mu

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Response to Thirties Child (Reply #12)

Thu Jun 11, 2020, 05:02 PM

14. Lemuria

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Response to Jim__ (Original post)

Thu Jun 11, 2020, 03:16 PM

11. This can only mean one thing...

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Response to EarlG (Reply #11)

Thu Jun 11, 2020, 03:46 PM

13. AAAAAhhhhh!!

I think you could be right!

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