Sometimes, NPR Is Still Worth Listening To...

...Though less and less for the quality of their reporting (Danny Zwerdling being the single, glaring counter- example) , than for this sort of thing:

Listener John Bullit of Somerville, MA, adds his seismographic recording of the Planet Earth to our series SoundClips. He speeds the audio up so that what is normally inaudible to the human ear can be heard.

It's just about the most evocative audio you can imagine:
Ol' Momma Earth, as she clunks and bangs her various parts around,
each sound an earthquake somewhere...