Can humans cause an earthquake? | Gentlemachines |

"Records show the water table around Lorca has dropped a remarkable 250 meters over the past 50 years. Just as in California’s San Joaquin Valley and the scenic city of Venice, depleting large volumes of groundwater actually causes the land surface to sink. This is because the sediments compact without the water pressure that helps hold spaces between grains open. As a result, the land surface around Lorca is dropping in elevation by as much as 16 centimeters per year."