Oklahoma residents, whose homes and nerves has been shaken by an increase of earthquakes have, want to know what the cause of the temblors - and what can be done to stop them.
Hundreds of people will be expected to be in Edmond, Oklahoma, on Thursday evening for a town hall meeting on the subject.
Earthquake earlier become almost of unheard on the wide Prairie, which unfold Texas, Kansas and Oklahoma, but they are common in the last few years.
Oklahoma recorded almost 150 between January and early May. When most had been too weak, leading to severe damage or endanger life, they moved suspected that the wobble method known as hydraulic could be fracturing associated with oil and gas drilling above all the fountain, where the industry has the sewage.
Now after years is enough by the anxious residents Governments in all three countries are again faced with the task review scientific data, the public debate and the new regulations. Thursday meetings in Oklahoma is the State agency that regulates oil and gas drilling and the Oklahoma geological survey.
States try the scientific data with some historical earthquake to bring their citizens and the oil and gas industry in line with the interests.
"This is about risks,", said spokesman Oklahoma Corporation Commission Matt Skinner. "It is a little more complicated than that because of course we manage perceived risks. There were no definitive answers, but we wait for one. "We have what you go according to data."
Regulators from each country met for the first time in March in Oklahoma City exchanging information about the Quake and expressions to discuss standards on the lightly regulated fracking wastewater disposal.
In Texas, residents of Azle, a town Northwest of Fort Worth, which has hundreds of small earthquakes, wanted the State Capitol earlier this year to demand action of the State Chief oil and gas regulator, known as the railway Commission. The Commission found the House Sub-Committee on seismic activities formed the first State seismologist and legislators.
After Kansas 56 earthquake between October and April the Governor of a three-person task force records, to resolve the issue.
Seismologists know, that hydraulic fracturing - that includes rays, water, sand and deep underground rock formations, oil and gas, and to free chemicals - can cause that Microquakes, which only rarely strong enough to monitoring devices register.
But fracking generates lots of effluent, far more than traditional drilling methods. The water is there in so-called injection wells, pumped the waste thousands of meters underground send. Nobody knows for certain exactly what happens with the fluids then. Scientists are wondering whether she could trigger earthquakes by increasing underground pressure and lubricating oil error.
Another issue is whether injection well either could be operator pump too much water in the ground or at very high pressure pumps.
In the last few weeks night was strong enough, awake to the residents shook in Oklahoma City. The State experienced a 145 quake of 3.0 brightness or more between January and 2 may 2014, according to the Oklahoma geological survey. That compared with an average of two such quakes from 1978 to 2008.
Fallin' approved new testing and monitoring rules the injection wells, which earn operators, daily information on good volume and pressure, rather than monthly need for Governor of Oklahoma Mary. The rules come in force in September, Skinner said.
Southern Methodist University researchers recorded more than 300 quakes around Azle, have since early December, a few days experience no swarms of hundreds Microquakes, and on other days. The Geophysicist measured the earthquake to draw an ancient fault line and develop models, which the rock where the quake originating consider as liquids flow through the layer.
However seismologists of the time - and the oil and gas industry taken pain to point out that a clear correlation is not yet fixed. Nationwide, the United States have more than 150,000 injection wells, proven trigger earthquakes according to the society of Petroleum Engineers, and only a handful.
"The connection between injection wells and earthquake is something that we are still under study," said Heather DeShon, an associate professor of geophysics at the SMU.
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Schmall from Azle, Texas reported. This associated Press reporter Tim Talley in Oklahoma City contributed. Follow Kristi Eaton on Twitter at the http://twitter.com/KristiEaton
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