Here Are 2 Ways We Now Know the Fracking Boom Is Causing Earthquakes

Researchers already knew part of the fracking process was causing the ground shake. Now they think the sheer amount of drilling it's enabled might be causing quakes, too. 


Hyrdaulic fracking has handed the United States a remarkable (and remarkably lucrative) oil and gas boom. In some corners of the country, though, it also seems to have led to something of an earthquake boom.

Past research has connected earthquakes in seismically mellow states like Oklahoma and Ohio to the process companies use to dispose of the water and chemicals used in fracking. Drillers inject those spent fluids into deep wells underground, which can weaken faults and trigger a quake. An important caveat: only a handful of the 30,000 disposal wells around the country have ever been implicated.

A new paper, by a team from the University of Texas, however, adds a new wrinkle to the fracking-earthquake connection. In this case, it's not the process of fracking itself that's at fault, just the volume of drilling it's enabled. As the Wall Street Journal reports, researchers found that the sheer quantity of oil and gas being removed from Texas's Eagle Ford Shale formation has actually made the region more quake-prone. Per the WSJ

The new study doesn't find much evidence that the man-made fracturing is causing earthquakes all by itself.

The connection is more indirect, the study found: New wells are extracting nearly 600,000 barrels of oil a day and a considerable amount of water as well. Given the scale at which oil is now being removed, enough liquids are being disturbed that rocks are settling and faults slipping, causing the small earthquakes.

As the Journal notes, Southern California experienced a similar spate of drilling-induced quakes during its own oil rush, in the 19th century. 

Now, we're not really talking about giant, earth-rending cataclysms here. Most of the seismic incidents at issue are extremely small. But the largest of the 62 probable quakes included in the survey, a 4.8 magnitude event in rural Fashing Texas that was felt some 47 miles away in San Antonio, was large enough to be of some concern. "If that had happened in an urban area there would have been severe damage,” Cliff Frohlich, one of the paper's lead researchers, told Fuel Fix

That said, this report does seem like a bit of good news for the oil and gas industry. As Reuters reports today, plaintiffs in Arkansas have filed five separate lawsuits against drillers whose disposal wells triggered earthquakes. It's a bit harder to think of how you'd sue companies for the consequences of a plain old oil rush. 

Presented by

Jordan Weissmann is a senior associate editor at The Atlantic.

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register with Disqus.

Please note that The Atlantic's account system is separate from our commenting system. To log in or register with The Atlantic, use the Sign In button at the top of every page.

blog comments powered by Disqus


A Stop-Motion Tour of New York City

A filmmaker animated hundreds of still photographs to create this Big Apple flip book


The Absurd Psychology of Restaurant Menus

Would people eat healthier if celery was called "cool celery?"


This Japanese Inn Has Been Open For 1,300 Years

It's one of the oldest family businesses in the world.


What Happens Inside a Dying Mind?

Science cannot fully explain near-death experiences.

More in Business

Just In