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The agency said it detected a 1.3 magnitude earthquake just before noon in North Stamford. Such a quake is likely not powerful enough to cause any structural damage but can be strong enough for residents to feel the ground shake.
Multiple people in North Stamford reported feeling tremors and hearing a loud noise at the same time as the reported earthquake.
"I live near Hunting Ridge in North Stamford," someone posted on Reddit. "It felt like someone dropped something heavy on the floor above me."
Others in the area north of the Merritt Parkway also reported feeling and hearing something similar.
It's unclear what caused the loud boom that many people reported hearing, however.
This is the second time in a week that residents there have rushed to social media to confirm what they'd heard.
Several people reported hearing a loud boom and feeling tremors late Thursday and Friday, Nov. 14 and 15. However, the U.S. Geological Survey did not report any seismic activity on those dates.
Stamford fire officials said they had received about a dozen calls from residents asking about the incidents last week. Authorities investigated the reports but did not find any potential source.
"Based on thorough investigations conducted by multiple fire department units, as well as confirmations from the Tennessee Gas Pipeline and Eversource Gas, we feel confident reassuring Stamford residents that there is no ongoing threat to life or property," the fire department said in a statement.
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