Study: Oklahoma’s earthquakes related to wastewater injection depth

Human-made earthquakes in Oklahoma are strongly linked to the depth at which wastewater from the oil and gas industry are injected into the ground, according to a new study, led by researchers from the university of Bristol. There has been an approximately 800-fold increase in the annual number of earthquakes in Oklahoma since 2011. Here’s a quote from the article:

“The team found that the joint effects of depth and volume are critical, and that injection volume becomes more influential — and more likely to cause earthquakes — at depths where layered sedimentary rocks meet crystalline basement rocks. This is because deeper wells allow easier access for fluids into fractured basement rocks that are much more prone to earthquakes.”

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