sounds coming from the center of the earth?

[plcdude]

Has anyone heard about this?

[RandySF]

1. That's old news.

When I was a kid, our church pastor used to push that as evidence there is a Hell.

[immoderate]

2. Hadn't thought about it, but continents sliding around should make a racket?

--imm

[muriel_volestrangler]

4. Detection of quakes and tremors is basically detecting low frequency sound waves

Human beings can detect sounds in the frequency range 20-20,000 Hertz. If a P wave refracts out of the rock surface into the air, and it has a frequency in the audible range, it will be heard as a rumble. Most earthquake waves have a frequency of less than 20 Hz, so the waves themselves are usually not heard. Most of the rumbling noise heard during an earthquake is the building and its contents moving.

http://earthquake.usgs.gov/learn/facts.php

[immoderate]

5. I should have said "sub-sonic."

--imm

[dmallind]

3. Ah the old Siberian Hell drill gag.

Never seem willing to let anybody test it for some reason......

[ZombieHorde]

6. Mother Earth sometimes enjoys a little Taco Bell. nt

[Codeine]

7. A thorough grasp of the Seven Layers Theory is essential to understanding plate tectonics.

[ZombieHorde]

8. Funny! nt

[laconicsax]

9. It's posts like this that make me glad I didn't lock this thread.

[Ter]

10. The "Hollow Earth Theory" is gaining lots of ground

No longer are we who believe kooks and nuts.

[laconicsax]

11. Nope. Hollow-earthers are still kooks and nuts.

If you'd like to present your evidence for a hollow earth, you're welcome to do so. Keep in mind that it won't be accepted uncritically.

[Codeine]

13. Gaining ground with kooks and nuts, at least.

Nobody with an ounce of sense buys into such baloney.

[Humanist_Activist]

12. I imagine the Earth is creating a lot of sound, just we can't detect most of it...

at least not without a lot of effort. The interaction between the outer and inner core probably produces a lot of noise, being that the outer core is flowing around the inner core. The Mantle would be churning, slowly but surely, as a semi-solid fluid of sorts, that would create a lot of noise, then you have the crust, broken into plates that grind against each other constantly, which creates a lot of noise we do detect.