I am a geologist, and the jury is out on the earthquake thing . . . Some people say that the fluid "greases the wheels" for smaller, less damaging earthquakes, and may actually prevent large, destructive earthquakes later.
That being said, I'm personally against it for a lot of other reasons (notably the secrecy involved with fracking fluid, which, for some reason, is classified as proprietary and never has to be disclosed to anyone ever - like the Coca Cola secret recipe).
I mean, does it really take a geologist to say that it may (or will) cause damage to the environment and drinking water??
I think it should take scientists to show something is dangerous. But I also think if there are serious unanswered questions and companies motivated by profit with potential environmental damage, then perhaps expansion should be curtailed until more research can be done. Something doesn't seem right with fracking... but science has shown lots of things that don't look right are actually fine. But with so many questions in the air, I don't think it best to keep expanding operations until something conclusive can be shown.
I don't have the computer skill to create a link but check out Bakken oil fields/fail of the day. I have at least 2 dozen friends working in North Dakota. They are making really good money but working their butts off for it. They work 7 days a week for 12 hours per day. They can't keep the kids on the farm around here.
My brother works for a company in Erie, Pa. that does fracing. He sells energy to companies that need it. I hear both sides of the story. He says that ALL the testing done has shown that fracing is safe. I don't think they have done enough tests. They could be destroying the Earth faster than we can fix it.
While it does bring cheaper energy and good paying jobs ( two important things ) it also brings a lot of mayhem. In places like the Bakken, those towns were not ready for the influx of workers. No housing, schools, hospitals, infrastructure, police, jails, ect, ect. They are trying to build all that but that results in taxes going thru the roof. Not everyone in those towns is making the big bucks to go along. And life is not real pretty for these boom towns. The transient workers have brought a wild west flavor to the towns that they don't like. Whore houses were set up before doctors offices. Most workers live in man camps. The reports I hear are terrible. It reminds me of the Alaskan Pipeline boom of the late 70's.
Check and make sure you own the mineral right on your land.