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OKLAHOMA CITY (AP) — A 5.8-magnitude earthquake and a series of smaller aftershocks in Oklahoma led to the discovery of a new fault line and stoked fears among some scientists about activity along other unknown faults that could be triggered by oil and gas wastewater that's being injected deep underground.
State and federal regulators on Monday said 32 disposal wells in northeastern Oklahoma must shut down because they are too near the newly discovered fault line that produced the state's strongest earthquake on record on Sept. 3.
Jeremy Boak, head of the Oklahoma Geological Survey, said it's possible that a large "pulse" of disposed wastewater is slowly moving deep underground and triggered the temblor along the new fault located near the town of Pawnee, farther east than most of the previous earthquake activity in Oklahoma.
"My inclination is to worry about the (fault) we don't know about yet, more so than about another very large earthquake in this area," Boak said. "My general feeling is that the rate of earthquakes is declining. I'm more concerned, I think, about whether there's another one of these faults out here that is cued up and ready to go."
originally posted by: TrueAmerican
a reply to: Another_Nut
It's nice to see someone else who understands why a necessary neutrality on the issue is warranted, given all the facts. Unlike the poster above you, who is prepared to PROVE, beyond a shadow of a doubt, that it is fracking causing this. Lol- when our best scientists can't for sure say one way or the other.
Now what do you suppose will happen if a major quake, 7+ was to hit along this new fault, or another one in the area? Would fracking have caused that too? No way in hell would I believe that. And seriously, for the people in OK's sakes, I don't want to find out the hard way- that is never was fracking all along, and that it is just a seismically activated area. A 7+ would virtually kill the "fracking caused it" crowd. And to be honest, I used to be In that camp. Now I am not sure at all. A 5.8 is high enough to be deemed a tectonic quake, with a necessary fault length to support that magnitude. Anything higher almost SURELY will be a tectonic cause.
In all, the 75,000 barrels a day of wastewater that was being injected in the area is being reduced to about 35,000 barrels a day, said Jim Marlatt with the oil and gas division of the Oklahoma Corporation Commission.
originally posted by: Flavian
a reply to: TrueAmerican
Do you think it possible that Oklahoma activity is linked to any dormant glacial rebound from the Laurentide Ice Sheet?
originally posted by: Nyiah
TA, could it boil down to something as small as a thin "river" under there?