What is behind the tremors in North Texas? Starting late last fall, a swarm of quakes struck the communities of Reno and Azle outside of Fort Worth. It’s hardly the first community in the Lone Star State to have to deal with damaged foundations, cracked windows and rude awakenings from quakes: there have been nine other scientifically-researched quake swarms in Texas, all of them in areas of oil and gas drilling activity

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