4/10/2014 — Major Movement — 4.2M Fracking earthquake — THREE THIS WEEK in Oklahoma

April 10, 2014

The Oklahoma fracking earthquake swarm continues to show signs of building pressure.

Showing as multiple 3.0M to mid 4.0M earthquakes , occurring directly at (or very close to) injection well pumps / fracking operations — now ramping up in magnitude over the past several months.

Today , April 10, another 4.2M event has struck directly next to a small group of Oil / Gas wells in central Oklahoma.

Occurring just 0.3 miles (1,300 feet) away from the nearest well head .

oklahoma fracking earthquake april 10 2014 4.2m

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This newest 4.2M event is part of a series of THREE noteworthy 4.2M earthquakes, and nearly FORTY 2.5M to 3.9M  earthquakes, all happening over the past 7 days (up to April 10 , 2014).

These earthquakes, comprising what should be called a legitimate “Seismic Swarm”.

multiple 4.2 april 10 2014

April 10, 4.2M earthquake:

http://earthquake.usgs.gov/earthquakes/eventpage/usc000pdy4#summary

April 7, 4.2M earthquake:

http://earthquake.usgs.gov/earthquakes/eventpage/usc000p92s#summary

April 6, 4.2M earthquake:

http://earthquake.usgs.gov/earthquakes/eventpage/usc000p7n7#summary

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Each one of these earthquakes is occurring directly near / at an injection / fracking / oil well.

The swarm location is obvious.

From the USGS, seismic swarm definition:

“A seismic swarm is by definition a localized surge of earthquakes, with no one shock being conspicuously larger than all other shocks of the swarm. Seismic swarms typically last longer than more typical earthquake sequences that consist of a main shock followed by significantly smaller aftershocks. Seismic swarms occur in a variety of geologic environments.”

 

oklahoma swarm april 10 2014

Past 7 days of 2.5M and greater earthquakes in the US (up to April 10, 2014). Oklahoma clearly defined by the large number of events. Also make note of the single 3.1M earthquake along the New Madrid Seismic Zone (NMSZ).

 

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USGS has confirmed fracking to be the culprit:

http://www.usgs.gov/newsroom/article.asp?ID=3710#.U0ZV-lcVAwA

Earthquake Swarm Continues in Central Oklahoma
Released: 10/22/2013 1:07:59 PM

Contact Information:
U.S. Department of the Interior, U.S. Geological Survey
Office of Communications and Publishing
12201 Sunrise Valley Dr, MS 119
Reston, VA 20192
Heidi  Koontz 1-click interview
Phone: 303-202-4763
In partnership with: Oklahoma Geological Survey
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.The U.S. Geological Survey and Oklahoma Geological Survey are conducting collaborative research quantifying the changes in earthquake rate in the Oklahoma City region, assessing the implications of this swarm for large-earthquake hazard, and evaluating possible links between these earthquakes and wastewater disposal related to oil and gas production activities in the region.Studies show one to three magnitude 3.0 earthquakes or larger occurred yearly from 1975 to 2008, while the average grew to around 40 earthquakes per year from 2009 to mid-2013.”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 Bill Leith, USGS seismologist. “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.”The analysis suggests that a contributing factor to the increase in earthquakes triggers may be from activities such as wastewater disposal–a phenomenon known as injection-induced seismicity. The OGS has examined the behavior of the seismicity through the state assessing the optimal fault orientations and stresses within the region of increased seismicity, particularly the unique behavior of the Jones swarm just east of Oklahoma City. The USGS and OGS are now focusing on determining whether evidence exists for such triggering, which is widely viewed as being demonstrated in recent years in Arkansas, Ohio and Colorado.

This “swarm” includes the largest earthquake ever recorded in Oklahoma, a magnitude 5.6 that occurred near Prague Nov. 5, 2011.  It damaged a number of homes as well as the historic Benedictine Hall at St. Gregory’s University, in Shawnee, Okla.  Almost 60 years earlier in1952, a comparable magnitude 5.5, struck El Reno and Oklahoma City. More recently, earthquakes of magnitude 4.4 and 4.2 hit east of Oklahoma City on April 16, 2013, causing objects to fall off shelves.

Following the earthquakes that occurred near Prague in 2011, the agencies issued a joint statement, focusing on the Prague event and ongoing seismic monitoring in the region.  Since then, the USGS and OGS have continued monitoring and reporting earthquakes, and have also made progress evaluating the significance of the swarm.

Important to people living in the Oklahoma City region is that earthquake hazard has increased as a result of the swarm. USGS calculates that ground motion probabilities, which relate to potential damage and are the basis for the seismic provisions of building codes, have increased in Oklahoma City as a result of this swarm.  While it’s been known for decades that Oklahoma is “earthquake country,” the increased hazard has important implications for residents and businesses in the area.

To more accurately determine the locations and magnitudes of earthquakes in Oklahoma, the OGS operates a 15-station seismic network.  Data from this system, and from portable seismic stations installed in the Oklahoma City region, are sent in real-time to the USGS National Earthquake Information Center, which provides 24×7 reporting on earthquakes worldwide.

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