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WASHINGTON -- An unusual and widely felt 5.6-magnitude quake in Oklahoma in 2011 was probably caused when oil drilling waste was pushed deep underground, a team of university and federal scientists concluded.
That would make it the most powerful quake to be blamed on deep injections of wastewater, according to a study published Tuesday by the journal Geology. The waste was from traditional drilling, not from the hydraulic fracturing technique, or fracking.
Three outside scientists contacted by The Associated Press said the researchers made a strong case for a likely man-made cause.
"I think they made the case that it is possible; it's probably even more than possible," said Steve Horton, director of the Center for Earthquake Research and Information at the University of Memphis. "They have a very reasonable conclusion."
Originally posted by AQuestion
reply to post by MariaLida
Dear MariaLida,
The scientists did not say that drilling "caused" the quake. They said it was possible; but, even that is a big stretch. They have been drilling oil in Oklahoma for quite a while. The truth is that we are having earthquakes in places where we have not traditionally had them and we don't know why.
Three outside scientists contacted by The Associated Press said the researchers made a strong case for a likely man-made cause. "I think they made the case that it is possible; it's probably even more than possible," said Steve Horton, director of the Center for Earthquake Research and Information at the University of Memphis. "They have a very reasonable conclusion."
Originally posted by rickymouse
Seems to me that all that fracking would weaken the crust in the madrid fault zone and possibly bring forth a large quake earlier. It may make it less severe though. Maybe that is why they are allowing all the fracking, maybe they mistakenly think it is going to help.
Originally posted by Abstruse
What I am wondering is who do we sue for willful negligence, pain, suffering, and damages? Exxon? British Petroleum? The environmental protection agency?
emphasis mine
Three outside scientists contacted by The Associated Press said the researchers made a strong case for a likely man-made cause. "I think they made the case that it is possible; it's probably even more than possible," said Steve Horton, director of the Center for Earthquake Research and Information at the University of Memphis. "They have a very reasonable conclusion."
Originally posted by Abstruse
It makes sense to me that drilling for resources are the underlying causes of these 'freak' earthquakes and sink holes.
If I decide to dig for crap under your house, building, or dog house, eventually the foundation supporting such objects will weaken and cause such things to happen. I don't think it could be any more obvious. Those resources they're extracting help support the top-soil layer's foundational strength; removing them could only lead to these events purporting the Earth.
What I am wondering is who do we sue for willful negligence, pain, suffering, and damages? Exxon? British Petroleum? The environmental protection agency?
Earth's crust is pervasively fractured at depth by faults. These faults can sustain high stresses without slipping because natural "tectonic" stress and the weight of the overlying rock pushes the opposing fault blocks together, increasing the frictional resistance to fault slip. The injected wastewater counteracts the frictional forces on faults and, in effect, "pries them apart", thereby facilitating earthquake slip.
Earthquakes are known to be associated with oil, gas, and geothermal energy production. The intent is to develop physical models that predict when seismicity is likely to occur, and to determine to what extent these earthquakes can be used to infer conditions within energy reservoirs. Early work focused on earthquakes induced by oil and gas extraction.
Research Org:
Stanford Univ., CA (United States). Dept. of Geophysics
Sponsoring Org:
USDOE Office of Energy Research, Washington, DC (United States)
Injection of fluid wastes into the fractured Precambrian crystalline bedrock beneath the Rocky Mountain Arsenal near Denver triggered earthquakes in the 1960's
The goal of TAIS WG is to summarize a present state of knowledge about the induced and triggered seismicity processes and to discuss future trends in the field. Its purpose is also to provide an overview of the capabilities and limitations of current monitoring techniques and interpretation methods as applied to triggered earthquakes to assess and mitigate the seismic hazard.
Originally posted by MrWendal
Originally posted by AQuestion
reply to post by MariaLida
Dear MariaLida,
The scientists did not say that drilling "caused" the quake. They said it was possible; but, even that is a big stretch. They have been drilling oil in Oklahoma for quite a while. The truth is that we are having earthquakes in places where we have not traditionally had them and we don't know why.
How about actually clicking the links?
What you dont realize is while ytou are claiming what the scientist say and dont say and whine about the title of the thread- the actual titles of the article are saying the same thing
Bloomberg Title, "Quake Tied to Oil-Drilling Waste Adds Pressure for Rules
Fox title: Large 5.6- magnitude 2011 Oklahoma earthquake was likely man made scientist say
Mercury News: Powerful Oklahoma Quake was caused by oil drilling procedure scientist say
A new study in the journal Geology is the latest to tie a string of unusual earthquakes, in this case, in central Oklahoma, to the injection of wastewater deep underground. Researchers now say that the magnitude 5.7 earthquake near Prague, Okla., on Nov. 6, 2011, may also be the largest ever linked to wastewater injection.
Scientists have linked a rising number of quakes in normally calm parts of Arkansas, Texas, Ohio and Colorado to below-ground injection. In the last four years, the number of quakes in the middle of the United States jumped 11-fold from the three decades prior, the authors of the Geology study estimate. Last year, a group at the U.S. Geological Survey also attributed a remarkable rise in small- to mid-size quakes in the region to humans. The risk is serious enough that the National Academy of Sciences, in a report last year called for further research to “understand, limit and respond” to induced seismic events. Despite these studies, wastewater injection continues near the Oklahoma earthquakes.
In many of the wastewater injection cases documented so far, earthquakes followed within days or months of fluid injection starting. In contrast, the Oklahoma swarm happened years after injection began, similar to swarms at the Cogdell oil field in West Texas and the Fort St. John area of British Columbia.
Scientists have linked the underground injection of oil-drilling wastewater to a magnitude-5.7 earthquake in 2011 that struck the US state of Oklahoma.