Earthquakes in Groningen
Compared to gas fields in other parts of the world, the Groningen gas field is densely populated;
The quakes are very shallow and therefore have more effect;
It's not only the quakes but also the slow sagging of the ground. The land in Groningen has a complex structure which hasn't been studied properly and is still poorly understood;
The Groningen quakes are not a ‘fact of life’, but a political choice: they can be stopped if desired;