Dozens of people in East Hampton reported hearing a large "boom" around 8:30 a.m. Wednesday morning.
Many people posted in the Let's Talk About East Hampton Facebook group about what some said sounded like an explosion.
"My dog and I are both panicking. I thought a car hit our house," Kimber Mae Perrotta commented.
Perrotta says this isn’t the first time she’s heard them.
Get top local stories in Connecticut delivered to you every morning. Sign up for NBC Connecticut's News Headlines newsletter.
“It’s been like a rumble. I guess there have been ones like this, but I’ve never heard or experienced anything like that before,” she said.
"Shook my house on Colchester Avenue near Tartia," Sandy Nesci wrote.
"Felt on South Main whole house shook, went running outside to see if a tree had fallen on house," Kelly K said.
Local
East Hampton police said they hadn't received any calls about the "boom" this morning.
A short time later, the town posted about it on its Facebook page.
"We have heard about the noise and shaking this morning a little before 9am. After checking the area of the south end of the Town and having no specific reports of issues or problems at this time, we, too, attribute the situation to the 'Moodus Noises,'" the town posted.
The Moodus Noises have been heard for generations in the area. The noises have been attributed to seismic activity in Moodus, which is a village in nearby East Haddam. They are often heard as a low rumbling.
Athletic teams at East Haddam's Nathan Hale-Ray High School are nicknamed the Noises in a nod to the rumblings heard for centuries in town.
The United States Geological Survey did not report any earthquakes in the area Wednesday morning.