USGS: 5.4 magnitude quake strikes off S. Korea's coast

SEOUL, South Korea -- The United States Geological Survey said early Wednesday a 5.4 magnitude quake hit off South Korea's southeastern coast.There were no immediate reports of injuries.Residents in the capital Seoul, more than 300 kilometers (186 miles) away, say they've felt tremors and are reporting their buildings have been shaken.South Korea has relatively little seismic activity, unlike neighboring Japan.Stay with 10TV and 10TV.com for the latest on this developing story.