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SMU scientists to deploy 22 seismographs to study Irving-area earthquake series

SMU scientists stress that learning more about this recent series of earthquakes will be an incremental process

SMU’s seismology team will deploy 22 more seismographs in the Irving area over the next few days to better understand the series of earthquakes that United States Geological Survey (USGS) data indicates are occurring on or near the site of the old Texas Stadium.

Fifteen monitors are being deployed today, Jan. 7. Two more being provided by the USGS are expected to arrive and be deployed Thursday, and another five provided by Incorporated Research Institutions for Seismology (IRIS) are scheduled for deployment Friday.

The SMU scientists stress that learning more about this recent series of earthquakes will be an incremental process.

DeShon, SMU, geophysics, earthquakes, North Texas
Morrison Formation, Jurassic, climate, ancient soil, Myers, paleosols

“In the near term, our first step is to put out seismographs to confirm and refine the location of the quakes and define the faults in the area,” said Heather DeShon, associate professor of geophysics at SMU. “Only after we get that data will we be in a position to investigate the potential cause of the earthquakes.”

The current earthquakes are the fourth sequence of felt earthquakes recorded in the Fort Worth Basin since 2008. The previous earthquakes sequences occurred near DFW Airport, Cleburne, and the Reno-Azle area. SMU studies of the DFW and Cleburne quakes cited wastewater injection wells as a plausible cause of the seismicity in those areas.

Information on those previous SMU studies is available at “Understanding recent North Texas seismicity.” The report on the earthquakes in the Azle-Reno area has not yet been released.

“It’s premature to speculate on the cause of this current series of seismic events,” said Brian Stump, SMU’s Albritton Chair of Geological Sciences. “We’re just getting started. We want to support the local community in understanding these earthquakes, and the team appreciates the cooperation of the City of Irving, the United States Geological Survey and IRIS in helping us get the best information possible.”

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SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

SMU has an uplink facility located on campus for live TV, radio, or online interviews. To speak with an SMU expert or book an SMU guest in the studio, call SMU News & Communications at 214-768-7650.

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Earth & Climate Energy & Matter Researcher news

SMU seismologist Brian Stump named AAAS Fellow for distinguished scientific contributions

Stump’s work in underground nuclear explosion monitoring is significant in support of the Comprehensive Nuclear-Test-Ban Treaty

SMU seismologist Brian Stump has been named an American Association for the Advancement of Science (AAAS) Fellow for distinguished contributions to his field, particularly in the area of seismic monitoring in support of the Comprehensive Nuclear-Test-Ban Treaty.

AAAS is the world’s largest general scientific society and publisher of the journal Science. Stump, Albritton Chair of Geological Sciences in the Roy M. Huffington Department of Earth Sciences in SMU’s Dedman College, is the fifth professor at Southern Methodist University to be recognized as an AAAS Fellow.

“Dr. Stump is a scientist of the first rank and brings the results of his outstanding research into the classroom, where his students benefit from his example and insights as a scholar,” said SMU President R. Gerald Turner. “He richly deserves the AAAS recognition by his peers and we are proud that he calls SMU home.”

Stump is well known regionally for his continued work researching the increase of small earthquakes that have been occurring in North Texas since 2008.

But his work in detecting ground motion from explosions has for more than 20 years proved invaluable to the United States government in ensuring that the world’s nuclear powers abide by their agreements related to underground nuclear testing.

“Brian’s work has been seminal in scientists’ ability to rapidly and accurately discern the difference between an earthquake, a conventional explosion — such as might occur in a mining accident — and a nuclear test,” said James E. Quick, SMU vice president for research and dean of graduate studies. “His research is tremendously important to all of us, and yet he is equally committed to teaching and serving as a mentor to young faculty.”

Stump served as scientific adviser to the U.S. delegation to the Conference on Disarmament from 1994 through 1996 and continues to be called upon frequently to assist the U.S. government in the interpretation of seismic and acoustic data.

“I’m humbled by the recognition by the AAAS that science impacts the society in which we live,” Stump said. “I really believe that. And the work we’ve done at SMU on inducted seismicity in North Texas has that same blend of real science and societal impact.”

For the last five years Stump has chaired the Air Force Technical Applications Center Seismic Review Panel, which provides a review of federally funded efforts in nuclear monitoring. He served as a committee member on the National Academy of Sciences Committee on Seismology and Continental Dynamics from 2007 through 2012, and recently completed a term as board chair for Incorporated Research Institutions for Seismology (IRIS), a consortium of more than 100 universities funded by the National Science Foundation.

Stump joined SMU in 1983 from the Seismology Section of the Air Force Weapons Laboratory at Kirtland Air Force Base in New Mexico. He graduated summa cum laude from Linfield College in McMinnville, Ore. with a bachelor of arts in physics in 1974, received a master of arts from the University of California at Berkeley in 1975 and received his Ph.D. in geophysics from the University of California at Berkeley in 1979 after completing a thesis titled Investigation of Seismic Sources by the Linear Inversion of Seismograms.

SMU faculty previously named as AAAS Fellows are James Quick, volcanologist and research dean, who was named a Fellow in 2013; environmental biochemistry scholar Paul W. Ludden, SMU provost and vice president for academic affairs and a professor in the Department of Biological Sciences, who was named a Fellow in 2003; anthropologist David J. Meltzer, Henderson-Morrison Professor of Prehistory in the Department of Anthropology who was named a Fellow in 1998; and James E. Brooks, provost emeritus and professor emeritus in the Roy M. Huffington Department of Earth Sciences, who was named a Fellow in 1966.

The AAAS Fellows program began in 1874. AAAS members may be considered for the rank of fellow if nominated by the steering group of their respective sections, by three fellows, or by the association’s chief executive officer. Each steering group then reviews the nominations of individuals within its respective section and forwards a final list to the AAAS Council, which votes on the final list of fellows.

The Council is the policy making body of the AAAS, chaired by the president, and consisting of the members of the board of directors, the retiring section chairs, delegates from each electorate and each regional division, and two delegates from the National Association of Academies of Science. — Kimberly Cobb

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Earth & Climate Energy & Matter Researcher news SMU In The News

SMU Daily Campus: SMU seismologists investigate cause of North Texas earthquakes

SMU Heather DeShon earthquakes seismology

Journalist Jehadu Abshiro of the SMU Daily Campus covered the research of SMU seismologist Heather R. DeShon.

DeShon is leading the effort to trace the source of a recent sequence of small earthquakes in North Texas and any relationship they may have to the injection of waste water by energy companies using shale gas production to recover gas.

North Texas earthquakes occurring in the Reno-Azle area since Nov. 5, 2013, and in Mineral Wells since Nov. 28, 2013, have raised scientific questions about the nature of these sequences and heightened local and national concerns about the impact of shale gas production on infrastructure and subsurface structures.

The Daily Campus article published Feb. 9, “SMU seismologists investigate cause of North Texas earthquakes.”

DeShon, an associate professor of geophysics, is an expert in earthquake generation within subduction zones and intraplate settings, seismogenic zone processes, local earthquake tomography and volcano seismology.

Read the full story.

EXCERPT:

By Jehadu Abshiro
The Daily Campus

The Reno-Azle area, west of Fort Worth, has been experiencing more than 30 earthquakes since November, according to the U.S. Geological Survey.

The largest earthquake was 3.7 on the Richter scale. The majority of the earthquakes are at a low magnitude.

“The real question is how big can these earthquakes get,” said Christopher Hayward, director of geophysics research at SMU.

A group of 12 SMU scientists and students, a well as a Lake Highlands High School intern, are currently studying the Reno-Azle area.

Associate geophysics professor Heather DeShon is leading the study and Hayward is leading the installation process. The group has installed 12 instruments so far.

Questions whether the earthquakes are occurring because of fracking by oil and gas companies lead a group of Azle, Texas residents to travel to the state capitol Jan. 23.

“It is important we do not rush to conclusions,” DeShon said at a press conference Friday. “I understand people want results quickly. But we have to sit and wait a little while.”

Fracking is the injection of water, sand and chemicals under high pressure into bedrock to increase the flow of oil or gas. Of the about 35,000 shale gas wells in the U.S., only two cases show fracking-induced seismicity.

According to Hayward, the wastewater injection wells are more of a concern. Wastewater injection wells, about 30,000 in the U.S., dispose of waste fluids from producing oil and gas wells by injection wells drilled below fresh water aquifers. According to Induced Seismicity Potential in Energy Technologies, there were eight case studies linking earthquakes to these wastewater wells in the U.S. in 2011.

Wastewater disposal is a separate process from the fracking operation and may occur away from the fracked well.

Read the full story.

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Earth & Climate Energy & Matter Researcher news SMU In The News

Star-Telegram: Researchers say finding cause of Azle quakes will take time

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Journalist Jim Fuquay of the Fort Worth Star-Telegram covered the research of SMU seismologist Heather R. DeShon.

DeShon is leading the effort to trace the source of a recent sequence of small earthquakes in North Texas and any relationship they may have to the injection of waste water by energy companies using shale gas production to recover gas.

North Texas earthquakes occurring in the Reno-Azle area since Nov. 5, 2013, and in Mineral Wells since Nov. 28, 2013, have raised scientific questions about the nature of these sequences and heightened local and national concerns about the impact of shale gas production on infrastructure and subsurface structures.

The Star-Telegram article published Feb. 7, “Researchers say finding cause of Azle quakes will take time.”

DeShon, an associate professor of geophysics, is an expert in earthquake generation within subduction zones and intraplate settings, seismogenic zone processes, local earthquake tomography and volcano seismology.

Read the full story.

EXCERPT:

By Jim Fuquay
Star-Telegram

It could take a year or longer to nail down whether there is a link between the swarm of small earthquakes around Azle in recent months and nearby wastewater injection wells, researchers at Southern Methodist University said Friday.

The school’s new network of seismic activity sensors in northeast Parker County has detected numerous small earthquakes recently, said lead researcher Heather DeShon, an associate professor of geophysics.

But previous studies of quakes at Dallas/Fort Worth Airport and near Cleburne took one to two years to be published, and the Azle study could follow that timetable, DeShon said.

In 2009, SMU and University of Texas at Austin researchers began investigating small quakes at DFW Airport that occurred from October 2008 to May 2009. They published their study in March 2010. The quakes stopped after Chesapeake Energy in August 2009 shut down one of two injection wells it operated on D/FW property.

UT Austin researchers reviewed seismic data collected in several locations in the Barnett Shale between November 2009 and September 2011. Cliff Frohlich, senior research scientist at UT’s Institute for Geophysics, released his study in August 2012. He concluded that “injection-triggered earthquakes are more common than is generally recognized.”

Both studies also said it was “plausible” that the injection wells triggered the quakes, but DeShon said she hopes the latest study can be more precise.

“We want to get to a point where we can say, ‘This particular well affected this seemingly dead fault’,” she said. “But first we have to gather the data.”

Read the full story.

Follow SMUResearch.com on Twitter.

For more information, www.smuresearch.com.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

SMU has an uplink facility located on campus for live TV, radio, or online interviews. To speak with an SMU expert or book an SMU guest in the studio, call SMU News & Communications at 214-768-7650.

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Earth & Climate Energy & Matter Researcher news SMU In The News

AP-NBC 5 DFW: Reasearch Conducted to Determine the Cause for Texas Earthquakes

The Associated Press covered the research of SMU seismologist Heather R. DeShon.

DeShon is leading the effort to trace the source of a recent sequence of small earthquakes in North Texas and any relationship they may have to the injection of waste water by energy companies using shale gas production to recover gas.

North Texas earthquakes occurring in the Reno-Azle area since Nov. 5, 2013, and in Mineral Wells since Nov. 28, 2013, have raised scientific questions about the nature of these sequences and heightened local and national concerns about the impact of shale gas production on infrastructure and subsurface structures.

The NBC DFW broadcast aired Feb. 8, “Reasearch Conducted to Determine the Cause for Texas Earthquakes.”

DeShon, an associate professor of geophysics, is an expert in earthquake generation within subduction zones and intraplate settings, seismogenic zone processes, local earthquake tomography and volcano seismology.

Read the full story.

EXCERPT:

By Associated Press
NBC DFW

Researchers collecting seismic data hope it allows them to determine what role waste water injection wells have played in a string of small earthquakes northwest of Fort Worth.

The area in northeast Parker County, about 15 miles northwest of Fort Worth, has experienced more than 30 small earthquakes since November. Last month more than 30 area residents traveled to Austin to ask the Texas Railroad Commission to consider shutting down injection wells there, but the commission said it didn’t have enough information.

“We want to get to a point where we can say, `This particular well affected this seemingly dead fault,”‘ Heather DeShon, an associate professor of geophysics at Southern Methodist University told the Fort Worth Star-Telegram. “But first we have to gather the data.”

DeShon said the school’s network of seismic activity sensors in an area about 15 miles northwest of Fort Worth have detected numerous small earthquakes recently. Still, it could take a year or more before researchers could tie the earthquakes around the town of Azle to injection wells in the area.

Oil wells often produce tons of salt water, which is pumped back into the ground through the so-called injection wells, to extract more oil. According to the Texas Railroad Commission, there are about 35,000 active injection wells in the state. About 7,000 of those are used for disposal. Experts have said it’s rare for the wells to produce seismic events, but it does happen.

There are five disposal wells around Azle.

Small earthquakes that occurred at the Dallas-Fort Worth airport from October 2008 to May 2009 stopped after one company shut down one of the two injection wells it operated on the airport property.

Read the full story.

Follow SMUResearch.com on Twitter.

For more information, www.smuresearch.com.

SMU is a nationally ranked private university in Dallas founded 100 years ago. Today, SMU enrolls nearly 11,000 students who benefit from the academic opportunities and international reach of seven degree-granting schools. For more information see www.smu.edu.

SMU has an uplink facility located on campus for live TV, radio, or online interviews. To speak with an SMU expert or book an SMU guest in the studio, call SMU News & Communications at 214-768-7650.