by John Bullitt
To make the original seismic signals audible, the recording has been speeded up 240-fold. The sounds the listener hears unfolding in six minutes correspond to the vibrations recorded over an entire day of real Earth time. You'll hear dozens of earthquakes, large and small, from around the globe, as well as the ebb and flow of storm-generated ocean surf noise, all against a steady backdrop of the Earth's own characteristic background noise. Delicate ticks and pops, distant booms, diffuse whoops, crackles, and whistles appear, only to slip away again into the background.