Drafting only
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/RichterFreqEnergyGraph-en.svg/500px-RichterFreqEnergyGraph-en.svg.png)
Induced Seismicity has been observed as a result of injection of fluids in the subsurface, occasionally by fracking ,[1] or more commonly in enhanced geothermal systems (EGS)
Drafting only
Induced Seismicity has been observed as a result of injection of fluids in the subsurface, occasionally by fracking ,[1] or more commonly in enhanced geothermal systems (EGS)