Can Humans Cause Earthquakes?

Scientists have been asking the question whether humans can cause earthquakes and maybe even if they could trigger a small one to prevent a large one. Certainly nuclear explosions are registered on the Richter Scale, but other exdperiements have looked at water. The unsustainable use of Groundwater  near Lorca, Spain is one possible cause put forward forward for the 5.1 earthquake that hit on May 11 2011. Removing water or even melting ice can cause rebounding changing pressure points. Similarly building large dams and resertvoirs may also compress the ground and change pressure points.

http://arstechnica.com/science/2012/10/can-humans-cause-an-earthquake/