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Tag:

earthquakes

Fracking May Induce Quakes at Greater Distance Than Previously Thought

Fracking May Induce Quakes at Greater Distance Than Previously Thought

written by Yale Environment 360

Hydraulic fracturing and underground wastewater disposal may trigger earthquakes at tens of kilometers from the wells in which water is injected — a greater range than previously thought, according to new research from seismologists.

In one case, an earthquake swarm in Oklahoma has been linked to a cluster of fracking injection wells up to 50 kilometers (31 miles) away, Cornell University researchers report. So-called “induced seismicity” — when human activity causes tremors in the earth’s crust — is gaining attention as reports of earthquakes within the central and eastern U.S. have increased dramatically over the past few years.

The rise coincides with increased hydraulic fracturing for oil and natural gas, and the injection of wastewater in deep disposal wells in many locations, including Colorado, Oklahoma, and Texas. According to the U.S. Geological Survey (USGS), an average rate of 100 earthquakes per year above a magnitude 3.0 occurred in the three years from 2010-2012, compared with an average rate of 21 events per year observed from 1967-2000. The agency is trying to “stay agnostic as to whether the earthquakes are induced or natural,” says a USGS geophysicist, since, currently, it’s difficult to determine what triggers a particular event.



May 2, 2014 0 comment
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Natural Gas Extraction Triggering More Earthquakes in Netherlands

written by Yale Environment 360

Extraction of natural gas from the deep soil in a region of the Netherlands has triggered an increase in minor earthquakes, similar to seismic effects that have raised concerns about drilling operations, including hydraulic fracturing, in other countries.

While the extraction of gas has occurred for decades

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March 28, 2013 0 comment
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Dozens of Small Earthquakes Detected Near Texas Drilling Sites

written by Yale Environment 360

A new study by researchers at the University of Texas has found that dozens of small earthquakes occurred in a shale region of north Texas within a two-year period, with many occurring close to injection wells associated with oil and gas drilling projects.

In an analysis of seismic data, study author Cliff

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August 8, 2012 0 comment
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Is There a Link Between Climate Change and Earthquakes?

written by Walter Wang

Several years ago, if you had included earthquakes in the litany of disasters caused by anthropogenic (human-induced) climate change – events like drought, flood, heat waves and the freezing cold that has settled over Britain several winters in a row – most scientists would have called you a “climate

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May 10, 2011 0 comment
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AltaRock Energy Geothermal Project in California Suspended

written by Ceylan Thomson

A $17 million renewable energy project designed to tap into the earth’s heat more than 2 miles deep has been suspended because of difficulty drilling through rock formations.

The project, run by AltaRock Energy and partially funded by Google, was designed to drill down to about 12,000 feet, fracture rock at the bottom of the hole, and then circulate water to create steam.

But the company reported that it had encountered “anomalies” in the rock that had prevented it from drilling deeper than 4,000 feet.

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September 4, 2009 0 comment
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