Metro

Small earthquake detected in Boxborough

US Geological Survey
The tiny quake happened in Boxborough, northwest of Boston.

The epicenter of a tiny earthquake Monday night was in a wooded area near the Wolf Swamp conservation area in Boxborough, the US Geological Survey said. Its only impact may have been to make a few swamp creatures pause in their nocturnal rounds.

The government agency says the 1.6-magnitude quake occurred about 3.6 miles underground at 8:48 p.m.

The area where the earth trembled was just off Interstate 495 northwest of Boston.

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Earthquakes with such small magnitudes are typically not felt, except by a very few people under especially favorable conditions, the USGS says.

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Police dispatchers in Boxborough and nearby Acton and Harvard said they hadn’t fielded any reports of a temblor. Boxborough police posted a tweet asking if anyone had felt it, but no one said they did.