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Earthquake Swarm Keeps Central Oklahoma All Shook Up

OKLAHOMA CITY (AP) — Tiny tremors shaking portions of central Oklahoma have proved more annoying than threatening but are still rattling homes and interrupting sleep.

Geologists aren't sure why the area around Arcadia and Luther is seeing an uptick in seismic activity. Some have speculated injection wells from the oil-and-gas industry could be contributing to the problem, while others say it's a natural phenomenon.

Since Tuesday, more than 16 minor temblors have been recorded in the region. The strongest quakes have ranged from magnitude 2.8 to 4.3.

In late 2011, the state's strongest quake ever was centered east of Luther in the Sparks community. It was magnitude 5.6 and damaged a spire at St. Gregory's University in Shawnee.

Luther Mayor Cecelia Taft is telling her residents to hang on.