updated 12/31/2011 4:03:12 PM ET 2011-12-31T21:03:12

Authorities say a minor earthquake hit in northeast Ohio.

The U.S. Geological Survey says the 4.0 magnitude quake struck Saturday afternoon in McDonald, outside of Youngstown.

There were no immediate reports of damage. One witness about 20 miles from the epicenter says she saw the ornaments shake on her Christmas tree. Others say it was strong enough to panic pets and send relatives running for cover.

It was the latest in a series of minor quakes in the area in 2011, though residents say Saturday's appeared to be stronger than others. Many have struck near an injection well used to dispose of brine water that's a byproduct of oil and gas drilling.

Its owner agreed this week to stop injecting brine into the earth while the quakes are investigated.

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