This app, will tell you the history of earthquakes, the circles are an infographic of the magnitute of the wave. For example, if you see 6 circles it represents an earthquake of a magnitude of 6. The stroke and the sound represents the destruction done. 

This app is used on your phone and you can press any circle on the world and it will tell you the magnitute and the date as well as the noice made in that location.