PLYMOUTH, Mass. A small-scale earthquake shook a section of Plymouth on Thursday.

Officials with the Weston Observatory, which monitors earthquake activity, say the 2.5 registered tremor was centered two miles south of the center of town.

The quake was felt just after 12:30 p.m., according to the observatory's Web site.

A quake of that magnitude is the smallest generally felt by people and not severe enough to cause damage.

"We deal with about half a dozen earthquakes a year felt somewhere in the New England region," said the observatory's director, John Ebel.

In Massachusetts, Ebel said, a majority of the seismic activity happens in the eastern portion of the state, usually concentrated north and northeast of Boston. The third area of activity is from Plymouth to the South Coast.

There were no immediate reports of damage or injuries, according to the Plymouth police and officials at the Massachusetts Emergency Management Agency.

Peter Judge, a spokesman for MEMA, said the quake caused no problems at Pilgrim Nuclear Power Plant in the town.

A local cultural institution, Pilgrim Hall Museum which houses many artifacts from the 17th-century, was also safe.

"Pilgrim Hall has not fallen," said Peggy M. Baker, the museum's director.