Mysterious Sonic Boom Shakes New Jersey, New York

January 28, 2016 Updated: January 28, 2016

Residents in New Jersey, Long Island, and elsewhere reported shaking and loud booms on Thursday afternoon, but U.S. Geological Survey said they weren’t caused by an earthquake.

Instead, the USGS said it was a series sonic boom based near Hammonton, New Jersey, according to the New York Daily News.

A sonic boom is a loud noise caused by shockwave that takes place after air vehicles break the sound barrier.

Authorities said there was no seismic activity, despite the swarm of tweets from residents saying it was and earthquake.

The first of the sonic booms took place at around 1:30 p.m.

“In my house my patio doors started shaking, the floor started shaking a little bit and I saw my neighbor’s patio door shaking,” Rob Coyne of Absecon told the Press of Atlantic City. “I knew it wasn’t me.”

“I felt my whole house shake twice,” Annette Santiago of Pleasantville told the publication. “It felt like a strong wind and my whole house just shook. The second time it felt like the ground was shaking. I heard the windows moving too. I thought I was going crazy that it was just me hearing stuff.”

“It was real loud,” Brigantine resident August Peltonen was quoted as saying. “Mailman said it he thought maybe was truck doing demolition.”

The military facility in Trenton, the Joint Base McGuire–Dix–Lakehurst, said no aircraft at the base can travel faster than the speed of sound. There was no ground artillery training there, either.

“It wasn’t us,” a spokesperson for the Joint Base McGuire–Dix–Lakehurst told ABC News.

The 177th Air National Guard was also not carrying out any flights in the area.