Pumping all that waste water into the ground has really helped Oklahoma and Texas catch up to California! Man-made earthquakes in those regions are now as likely as the real ones in some of California's riskiest zones. These new maps from the USGS tell the tale pretty well.
USGS scientists have now published the first maps of these new quake zones, and they're an eye-opener. An eye-opener because 7 million people are now, suddenly, living in quake zones. There are 21 hot spots where the quakes are concentrated. They're in places where, historically, noticeable earthquakes were rare: Texas, Colorado, Arkansas, Kansas, New Mexico, and Oklahoma. Ohio and Alabama have also experienced some induced quakes.
A decade ago, an Oklahoman could count the number of noticeable quakes on her fingers. "In this past year, we had over 900," says USGS seismic hazard expert Mark Petersen. "So the rates have surged."
Petersen says induced quakes have become more frequent because there's more wastewater from oil and gas operations around the country that has to be disposed of. Companies pump it down into underground wells, and sometimes that water raises pressure on underground faults that then slip and cause small quakes.
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This is amazing to watch.
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