Since 2014, there have been more than 230 earthquakes of magnitude 3 and above in a state, and before 2008, this number was an average of one per year  Frequent seismic activity has raised people's questions  Some researchers have found that since 2014, In order to avoid the pollution of surface water by the toxic wastewater generated during drilling and hydraulic fracturing in oil exploration, the state began to inject this wastewater between the impervious layers of underground rocks
Wastewater poured into the rock water layer will reduce the friction between the faults, making it easier to slide, thereby inducing earthquakes
This behavior is likely to be the key cause of the earthquake