Posted on July 5, 2014 by Bob Berwyn
Oklahoma earthquake spike definitively linked with wastewater injection.
More monitoring and mitigation needed, scientists say
By Summit Voice
FRISCO — Just a small number of wastewater injection wells associated with fossil fuel exploitation can lead to a dramatic increase in earthquakes, U.S. Geological Survey scientists concluded in a new study focusing on the spike in Oklahoma earthquakes since 2009. Wastewater injection can trigger earthquakes up to 20 miles away, the researchers found, far beyond the three-mile radius commonly used as a measure for diagnosing induced earthquakes.
The dramatic increase in earthquakes in central Oklahoma since 2009 is likely attributable to subsurface wastewater injection at just a handful of disposal wells. Oklahoma earthquakes constitute nearly half of all central and eastern U.S. seismicity from 2008 to 2013, many occurring in areas of high-rate water disposal, said Cornell University geophysics professor Katie Keranen, who led the study. Continue reading
Filed under: energy, Environment, fracking, gas drilling, oil drilling, oil shale | Tagged: earthquakes, fracking, induced seismicity, USGS | 1 Comment »
Posted on June 24, 2014 by Bob Berwyn
Signs of oil and gas development are visible on a landscape level from 35,000 feet in the air.
Wastewater disposal at injection well halted for 20 days
By Summit Voice
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FRISCO — Colorado regulators this week halted the disposal of fracking wastewater into a Weld County injection well as they try to fully understand the link between injection and recent earthquake activity in the area.
A magnitude 3.4 earthquake rattled Greely on May 31, and University of Colorado geologists have detected more low-level seismic activity, including a 2.6 temblor earlier this week. As a result, the Colorado Oil and Gas Conservation Commission directed High Sierra Water Services to halt injections for 20 days.
The well is 10,818 feet deep. Since start of operations, more than 28 million barrels of wastewater have been pumped underground.
The Colorado action comes just a couple of weeks after federal and state geologists in Oklahoma warned of increased risk for a damaging quakes after string of trenors rattled the Oklahoma City area. Continue reading
Filed under: Colorado, energy, Environment, fracking | Tagged: Colorado, earthquakes, fracking, injection induced seismicity, Weld County | 2 Comments »
Posted on May 28, 2014 by Bob Berwyn
Oklahoma earthquakes are on the increase.
Spike in tremors linked with injection of wastewater from fracking
By Summit Voice
FRISCO — Federal and state geologists say there’s an increased risk of a strong earthquake in Oklahoma after the overall rate of quakes increased by about 50 percent since late 2013.
After statistically analyzing the increased rate of earthquakes, the scientists said they’re fairly certain it’s not just natural variability — deep injection of waste water from fossil fuel exploitation is seen as a likely cause. Continue reading
Filed under: energy, Environment, fracking, gas drilling, oil drilling | Tagged: earthquakes, fracking, injection induced seismicity, Oklahoma, USGS | Leave a comment »
Posted on December 21, 2013 by Bob Berwyn
Could there be a tsunami in the Caribbean?
Guadeloupe seen as focal point for unreleased tectonic strain
FRISCO — The risk of a large earthquake and subsequent tsunami may be greater than previously thought, U.S. Geological Survey researchers say after studying the plate boundary in the Lesser Antilles region, where 20 of the 26 Caribbean islands are located.
The geologists estimate that enough unreleased strain may have accumulated offshore of Guadeloupe to potentially create a magnitude 8.0-8.4 earthquake. A magnitude 7.5 – 8.5 quake in 1843 killed several thousand people in Guadeloupe, and a similar quake in the future could cause several tens to several hundreds of fatalities, and hundreds of millions to billions of U.S. dollars in damages. Continue reading
Filed under: Environment | Tagged: Caribbean, earthquakes, tsunami, USGS | Leave a comment »
Posted on October 23, 2013 by Bob Berwyn
Geologists say a recent swarm of earthquakes in Oklahoma has increased the overall risk of tremors around Oklahoma City. Map courtesy Oklahoma Geological Survey.
Study suggests recent swarm of tremors is related to injection of fracking wastewater
By Summit Voice
FRISCO — State and federal geologists are teaming up to study a swarm of earthquakes that have rattled central Oklahoma, evaluating possible links between these earthquakes and wastewater disposal related to oil and gas production activities in the region.
Since January 2009, more than 200 magnitude 3.0 or greater earthquakes have rattled Central Oklahoma, marking a significant rise in the frequency of these seismic events. In a press release, the U.S. Geological Survey said a preliminary analysis suggests that the recent tremors are linked with the injection of wastewater from oil and gas drilling activities in the region.
We’ve statistically analyzed the recent earthquake rate changes and found that they do not seem to be due to typical, random fluctuations in natural seismicity rates,” said USGS seismologist Bill Leith. “These results suggest that significant changes in both the background rate of events and earthquake triggering properties needed to have occurred in order to explain the increases in seismicity. This is in contrast to what is typically observed when modeling natural earthquake swarms.” Continue reading
Filed under: energy, Environment, fracking, gas drilling, oil drilling | Tagged: earthquakes, fracking, injection-induced earthquakes, Oklahoma | 2 Comments »
Posted on August 21, 2013 by Bob Berwyn
Geologic study leaves little room for doubt
By Summit Voice
FRISCO — Youngstown, Ohio, seemingly on stable ground, had never experienced an earthquate going all the way back to 1776. But that all changed in December 2010, when a newly built well started to pump fracking wastewater into the ground.
Starting in January 2011, seismic instruments recorded 109 tremors, and a careful study of the pattern of earthquakes — as strong as a magnitude 3.9 — suggests they are linked to the well in neighboring Pennsylvania. Continue reading
Filed under: energy, Environment, fracking, gas drilling, oil drilling | Tagged: earthquakes, energy, Environment, fracking | 3 Comments »
Posted on August 4, 2012 by Bob Berwyn
Parts of the Cascadia subduction zone may be overdue for a large earthquake. Map courtesy USGS.
New research documents timeline of Pacific Northwest fault activity
By Summit Voice
SUMMIT COUNTY — The Pacific Northwest could be due for a monster earthquake sometime in the next 50 years, with Oregon’s southern coast pinpointed as the most vulnerable area, according to Oregon State University researchers who recently finished studying the pattern of historical quakes in the region.
The comprehensive analysis of the Cascadia Subduction Zone confirms numerous earthquakes during the past 10,000 years and estimates that a new quake could approach the intensity of the Tohoku quake that devastated Japan in March 2011.
“The southern margin of Cascadia has a much higher recurrence level for major earthquakes than the northern end and, frankly, it is overdue for a rupture,” said Chris Goldfinger, a professor in OSU’s College of Earth, Ocean, and Atmospheric Sciences and lead author of the study. “That doesn’t mean that an earthquake couldn’t strike first along the northern half, from Newport, Ore., to Vancouver Island. Continue reading
Filed under: world news | Tagged: Cascadia subduction zone, earthquakes, Oregon, Oregon State University, Pacific Northwest | Leave a comment »