Posted on 05/07/2014 11:47:50 AM PDT by topher
The rate of earthquakes in Oklahoma has increased remarkably since October 2013 – by about 50 percent – significantly increasing the chance for a damaging magnitude 5.5 or greater quake in central Oklahoma. View map of Oklahoma seismicity. View animation of Oklahoma Seismicity.
A new U.S. Geological Survey and Oklahoma Geological Survey analysis found that 145 earthquakes of magnitude 3.0 or greater occurred in Oklahoma from January 2014 (through May 2; see accompanying graphic). The previous annual record, set in 2013, was 109 earthquakes, while the long-term average earthquake rate, from 1978 to 2008, was just two magnitude 3.0 or larger earthquakes per year. Important to people living in central and north-central Oklahoma is that the likelihood of future, damaging earthquakes has increased as a result of the increased number of small and moderate shocks.
Oklahoma’s heightened earthquake activity since 2009 includes 20 magnitude 4.0 to 4.8 quakes, plus the largest earthquake in Oklahoma’s history – a magnitude 5.6 earthquake that occurred near Prague on Nov. 5, 2011. The 2011 Prague earthquake damaged a number of homes and the historic Benedictine Hall at St. Gregory's University in Shawnee. Prior to the 2011 Prague earthquake, the largest earthquake of Oklahoma’s history was a magnitude 5.5 earthquake that occurred in 1952 near El Reno and damaged state buildings in Oklahoma City.
“While it’s been known for decades that Oklahoma is ‘earthquake country’, we hope that this new advisory of increased hazard will become a crucial consideration in earthquake preparedness for residents, schools and businesses in the area,” said Dr. Bill Leith, Senior Science Advisor for Earthquakes and Geologic Hazards at USGS. “Building owners and government officials should have a special concern for older, unreinforced brick structures, which are vulnerable to serious damage during sufficient shaking.”
USGS 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. Significant changes in both the background rate of events and earthquake triggers needed to have occurred in order to explain the increases in seismicity, which is not typically observed when modeling natural earthquakes.
The analysis suggests that a likely contributing factor to the increase in earthquakes is triggering by wastewater injected into deep geologic formations. This phenomenon is known as injection-induced seismicity, which has been documented for nearly half a century, with new cases identified recently in Arkansas, Ohio, Texas and Colorado. A recent publication by the USGS suggests that a magnitude 5.0 foreshock to the 2011 Prague, Okla., earthquake was human-induced by fluid injection; that earthquake may have then triggered the mainshock and its aftershocks. OGS studies also indicate that some of the earthquakes in Oklahoma are due to fluid injection. The OGS and USGS continue to study the Prague earthquake sequence in relation to nearby injection activities.
Collaborative USGS and OGS research to understand earthquake rate increase in the central Oklahoma area includes quantifying the changes in earthquake rate, assessing the implications of the increased small and moderate earthquake activity for large earthquake hazards, and evaluating possible links between these earthquakes and wastewater disposal from oil and gas production activities. The OGS is also focused on seismicity in north-central Oklahoma.
To more accurately determine the locations and magnitudes of earthquakes in Oklahoma, the OGS has increased the number of monitoring stations and now operates a seismograph network of 15 permanent stations and 17 temporary stations, many of which are on loan from the USGS. There are also three permanent seismic stations operated by the USGS and the Incorporated Research Institutions for Seismology. Data from this network are shared in real-time with the USGS National Earthquake Information Center, which provides 24x7 reporting on earthquakes worldwide.
ping - USGS and Oklahoma GS seems to be pointing a finger at injection as a cause in the increase in tremors...
Could the OK Earthquakes be related to THIS:
http://www.freerepublic.com/focus/f-religion/3152265/posts
It’s from to many liberals moving into those areas....
Frack!
Please pass the tinfoil...
Still no mention of the Humboldt Fault Zone that lies underneath all this activity. You would think that would be a major part of the story but I guess attacking fracking fills a political narrative, whether there is something to it or not.
CGato
USGS doing their part to support the regime.
Climate Change™
Climate Disruption™ (subject to re-branding at any time)
Wow, look at how nicely that data agrees. Øbama took office, and the earthquake rate skyrocketed. I dare anyone to deny it!!!
What your saying then is that we have a factual correlation between obama's election and hell rising?
Id like to see all the stats, not just Oklahoma. Could be an increase world wide.
If it is just Oklahoma, then why?
More tinfoil..
Bad vibs from Obama and his administration causing this?
“The analysis suggests that a likely contributing factor to the increase in earthquakes is triggering by wastewater injected into deep geologic formations. This phenomenon is known as injection-induced seismicity, which has been documented for nearly half a century, with new cases identified recently in Arkansas, Ohio, Texas and Colorado. A recent publication by the USGS suggests that a magnitude 5.0 foreshock to the 2011 Prague, Okla., earthquake was human-induced by fluid injection; that earthquake may have then triggered the mainshock and its aftershocks. OGS studies also indicate that some of the earthquakes in Oklahoma are due to fluid injection. The OGS and USGS continue to study the Prague earthquake sequence in relation to nearby injection activities.”
Not from a place where fraking is done. Why is the injection of water thru fraking *not* the possible cause of increased seismic activity?
Smells like BS, to drum up anti-fracking hysteria.
tremors????
it’s the graboids, damnit...
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