People across the region felt a 3.8 magnitude earthquake that was centered off the coast of Maine in York Harbor. So how rare is such an occurrence in New England?

New England felt its third earthquake of the week early Sunday morning, as aftershocks continue following a Maine-based quake last Monday.

A light but rare 3.8-magnitude earthquake struck off the coast of southern Maine on Monday morning, according to the United States Geological Survey, sending trembles across New England. The earthquake’s epicenter was about 10 miles east of Portsmouth, N.H., the survey said. There were no immediate reports of injuries or damage.