Fluid injection triggers earthquakes indirectly, study finds
Artificially induced tremors start with slow, smooth slipping
![induced earthquake](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/06/ts_inducedquake_free.jpg?fit=860%2C460&ssl=1)
SHAKE UP Researchers triggered and carefully monitored earthquakes along a fault beneath an underground research facility in southeastern France. The fault slid smoothly at first before sparking quakes, the researchers found.
Yves Guglielmi