Even If Injection of Fracking Wastewater Stops, Quakes Won’t

Salty fluid sinks and puts pressure on rock, potentially triggering faults in Oklahoma for years to come

Scientific American
Sep 9 · 6 min read
Pumpjacks on the horizon underneath a partly cloudy beautiful sky.
Pumpjacks on the horizon underneath a partly cloudy beautiful sky.
Fracking pumpjacks in an oil field. Photo: grandriver/iStock/Getty Images

By Anna Kuchment

Jacob Walter likes to remind people that what has transpired in Oklahoma over the past decade is unprecedented in human history.

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