010203040506070-3≤M<-2-2≤M<-1-1≤M<00≤M<11≤M<22≤M<33≤M<44≤M<55≤M<66≤M<77≤M<8
Conventional oil and gas
Fracking
Geothermal
Mining
Waste fluid injection
Water reservoir impoundment
Other*
*"Other" category includes carbon capture and storage, construction, groundwater extraction, nuclear explosion, research experiments, and unspecified oil, gas and waste water.