AZLE, Texas, Dec. 4 (UPI) -- More than 20 minor earthquakes have been recorded in northern Texas, prompting one local school district to begin holding earthquake drills, officials said.
About 20 quakes have been recorded since Nov. 1, with the most recent coming at 9:44 a.m. Tuesday, registering a magnitude-2.7 and centered a mile outside Reno, Texas. Most of the temblors have been recorded in northeast Parker County, the Fort Worth Star-Telegram reported Wednesday.
The Azle school district began holding "drop, cover and hold" drills prior to the Thanksgiving break at the district's 10 schools.
"Most of us live in Azle," said district spokeswoman Tanya Anderson. "We knew [the quakes] were happening. We anticipated there would be concerns from some in our community."
Basically, they're teaching students to drop to the ground and cover their head in case of a serious earthquake.
Azle Mayor Alan Brundrett said his office has received calls from concerned residents but there's little he can do to investigate the phenomenon. Many residents have theorized new salt water injection mines in the area are to blame for the quakes, the largest of which was magnitude 3.6 -- big enough, Brundrett said, that it felt "like somebody came by and kicked your chair."