April 19. Increase in the number of earthquakes in the central United States may be associated, including the intensification of oil and gas. This was stated by a representative of the U.S. Geological Survey (US Geological Survey, USGS), William Ellsworth (William Ellsworth) seismologists at the conference in San Diego, reports
It is a method of extraction ugledovodorodov — frekinge — where in shale rock injected a mixture of water and sand, along with chemicals. According to The Guardian, Ellsworth said that scientists have found no evidence of a direct link fracturing with earthquakes of magnitude 3. However, in some cases water is injected into the reservoir caused seismic activity in the area.
According to research by USGS, three decades before 2000, in the central United States, including in Arkansas, Colorado, Oklahoma, New Mexico and Texas, there was about 21 earthquakes a year. In 2009, this figure rose to 50 in 2010 — 87, and in 2011 — to 134 earthquakes per year. In this case, it was during the second half of the 2000s in the U.S. boom in shale gas production. By the beginning of the 2010s the United States is almost entirely provided our economy with gas, and in 2009 overtook Russia for the production of fuel.
Opponents of hydrocarbon production by frekinga believe that it contaminates ground water and causes earthquakes. The EU has already two states have banned this method of development of mineral resources — the first was France, and in January 2012 a similar