Quake science! Seriously, when you pump stuff out of the ground, or crack rocks in an industrial scale, things are bound to shift.
So, even if this is true, why this is a big deal? Nobody has died from this. All quakes are minor. Earthquakes just sound scary, but these 3-4 Richter scale quakes are peanuts compared to real killers that happen NATURALLY!
In fact, you could make the case that the smaller quakes are relieving pressure that otherwise would build up and eventually cause a massive earthquake.
[[So, even if this is true, why this is a big deal?]]
Do you realizze how many prariedogs have hadf to go into therapy because of ‘man-caused earthquakes’? Have you no feelings for groundwellers?