Monthly Archives: May 2014

31May/14
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Earthquake – M3.2 – 9km ENE of Greeley, Colorado

Induced Seismicity

As is the case elsewhere in the world, there is evidence that some central and eastern North America earthquakes have been triggered or caused by human activities that have altered the stress conditions in earth’s crust sufficiently to induce faulting. Activities that have induced felt earthquakes in some geologic environments have included impoundment of water behind dams, injection of fluid into the earth’s crust, extraction of fluid or gas, and removal of rock in mining or quarrying operations. In much of eastern and central North America, the number of Continue reading

20May/14
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NIOSH Investigating Fatalities Around Well-Site Tanks

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