From StateImpact Texas:
State Oil and Gas Regulator Says No Changes Needed After Latest Earthquake Swarm
After twenty minor earthquakes in a month, residents in the small towns of Azle and Springtown outside of Fort Worth are understandably confused about why their once-stable region is now trembling on a near-daily basis.
Teachers in the Azle school district are taking a page from the California playbook and holding earthquake drills for students. Inspectors are making regular visits to the earthen Eagle Mountain Lake dam, as well as others in the area, checking for damage. (So far they've found none.) And locals like Rebecca Williams are constantly looking at their own homes for damage. So far she's found cracks in her home, driveway and in a retaining wall in her backyard.
The quakes have been small, below the threshold that is known to cause significant damage. But they've unnerved residents like Williams, who moved out to Eagle Mountain Lake looking for some peace and quiet. "You can actually see my house rocking from side to side," Williams says. She was at home when the largest of the quakes (magnitude 3.6) struck on the evening of November 19th. "I tried to get up and run downstairs," she says. "And for a moment, I couldn’t run, because the house was shaking so bad!”
So what's behind the tremors?