The Pennsylvania Department of Health instructed its employees never to talk to residents who complained of negative health effects from fracking, StateImpact Pennsylvania reported Thursday. Two retired employees of the department detailed restrictions on attending meetings, lists of topics they could not discuss, and a general departmental hostility to the idea of health problems linked to shale gas drilling. The state’s governor, Tom Corbett, declined to comment for StateImpact Pennsylvania’s story. Continue reading
Federal worker safety investigators are looking into the dangers of flowback tanks at oil and gas sites, in response to the deaths of at least four men who collapsed while taking measurements at tanks in the Bakken Shale. Continue reading
One of Oklahoma’s biggest man-made earthquakes, caused by fracking-linked wastewater injection, triggered an earthquake cascade that led to the damaging magnitude-5.7 Prague quake that struck on Nov. 6, 2011, a new study confirms.
The findings suggest that even small man-made earthquakes, such as those of just a magnitude 1 or magnitude 2, can trigger damaging quakes, said study co-author Elizabeth Cochran, a seismologist with the U.S. Geological Survey.
“Even if wastewater injection only directly affects a low-hazard fault, those smaller events could trigger an event on a larger fault nearby,” she told Live Science. Continue reading
The number of earthquakes has increased dramatically over the past few years within the central and eastern United States. Nearly 450 earthquakes magnitude 3.0 and larger occurred in the four years from 2010-2013, over 100 per year on average, compared with an average rate of 20 earthquakes per year observed from 1970-2000.
PITTSBURGH (AP) — In at least four states that have nurtured the nation’s energy boom, hundreds of complaints have been made about well-water contamination from oil or gas drilling, and pollution was confirmed in a number of them, according to a review that casts doubt on industry suggestions that such problems rarely happen.