Mine Landslide Triggered Earthquakes

Jan. 6, 2014 — Last year's gigantic landslide at a Utah copper mine probably was the biggest nonvolcanic slide in North America's modern history, and included two rock avalanches that happened 90 minutes apart and surprisingly triggered 16 small earthquakes, University of Utah scientists discovered.

http://www.sciencedaily.com/releases/2014/01/140106094206.htm