Researchers at USGS have prepared sound files for a number of earthquakes. These are not direct recordings of earthquake sounds. Instead they are produced by making a speaker shake the same way that the ground was shaken during the earthquake - but much more rapidly.
You May Need a Plug-in to Hear Them
The sound files on this page are in .wav format. If your browser
can't play them you will need to install a plug-in such as Apple QuickTime.