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A 4.5 magnitude earthquake struck the Bay Area Monday night, according to the U.S. Geological Survey.  

The quake struck at 10:33 p.m. and was centered 2.2 miles north of Walnut Creek.  

Police in Oakland, Pleasant Hill and Martinez said they've received no reports of any injuries or damage. 

As of 10:51 p.m., BART trains were running at reduced speeds while track inspections are made.  

BART officials said to expect delays of 10 to 15 minutes systemwide.