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Skepticism, Science & Pseudoscience

muriel_volestrangler

(104,040 posts)

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

Reply to immoderate (Reply #2)

Fri Feb 17, 2012, 11:28 AM

Feb 2012

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

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sounds coming from the center of the earth? [View all] plcdude Feb 2012 OP

That's old news. RandySF Feb 2012 #1

Hadn't thought about it, but continents sliding around should make a racket? immoderate Feb 2012 #2

Detection of quakes and tremors is basically detecting low frequency sound waves muriel_volestrangler Feb 2012 #4

I should have said "sub-sonic." immoderate Feb 2012 #5

Ah the old Siberian Hell drill gag. dmallind Feb 2012 #3

Mother Earth sometimes enjoys a little Taco Bell. nt ZombieHorde Feb 2012 #6

A thorough grasp of the Seven Layers Theory is essential to understanding plate tectonics. Codeine Feb 2012 #7

Funny! nt ZombieHorde Feb 2012 #8

It's posts like this that make me glad I didn't lock this thread. laconicsax Feb 2012 #9

The "Hollow Earth Theory" is gaining lots of ground Ter Feb 2012 #10

Nope. Hollow-earthers are still kooks and nuts. laconicsax Feb 2012 #11

Gaining ground with kooks and nuts, at least. Codeine Feb 2012 #13

I imagine the Earth is creating a lot of sound, just we can't detect most of it... Humanist_Activist Feb 2012 #12