That's the question neighbors in several South Jersey communities started asking themselves ever since a loud bang followed several seconds of ground shaking around 11am Saturday.
"We heard this rumble. Boom, boom boom," said Joe Longmore of Ventnor City.
He and his wife Tara were enjoying the morning outside in their backyard when jolted by the powerful sound.
"It was totally different. I never felt anything like that," Tara Longmore said.
Most residents called it a "sonic boom" but the phenomenon lit up social media websites like Facebook and Twitter with many asking if it was an earthquake.
It turned out to be military aircraft flying over water according to several local government officials, but it was enough to get plenty of people talking.
Typically a sonic boom is achieved when something travels through the air faster than the speed of sound, such as a jet.
Officials would not elaborate on the origin of the boom.
Tuesday, June 18 2013 10:43 PM EDT2013-06-19 02:43:10 GMT
Times are tough for many in Philadelphia with almost half a million people turning to food pantries just to survive. Several organizations are working to provide healthy options.
Times are tough for many in Philadelphia with almost half a million people turning to food pantries just to survive. Several organizations are working to provide healthy options.
Monday, June 17 2013 10:21 PM EDT2013-06-18 02:21:46 GMT
In Chester County, there was damage caused by severe storms as they ripped through the area this afternoon. It did not take long but it did quite a bit of damage.
In Chester County, there was damage caused by severe storms as they ripped through the area this afternoon. It did not take long but it did quite a bit of damage.
Tuesday, June 18 2013 10:43 PM EDT2013-06-19 02:43:10 GMT
Times are tough for many in Philadelphia with almost half a million people turning to food pantries just to survive. Several organizations are working to provide healthy options.
Times are tough for many in Philadelphia with almost half a million people turning to food pantries just to survive. Several organizations are working to provide healthy options.
Tuesday, June 18 2013 10:23 PM EDT2013-06-19 02:23:12 GMT
For the second time in one week, officers from the PSPCA are rescuing cats from another hoarding situation.17 cats have been rescued so far from a rowhome on the 2000 block of Margaret Street.
For the second time in one week, officers from the PSPCA are rescuing cats from another hoarding situation.17 cats have been rescued so far from a rowhome on the 2000 block of Margaret Street.
Tuesday, June 18 2013 10:20 PM EDT2013-06-19 02:20:21 GMT
Doctor Michelle Liggio was a very popular Pensauken doctor. Tonight she's a murder victim. Police say her husband shot her inside her office before turning the gun on himself.
Doctor Michelle Liggio was a very popular Pensauken doctor. Tonight she's a murder victim. Police say her husband shot her inside her office before turning the gun on himself.
Tuesday, June 18 2013 8:56 PM EDT2013-06-19 00:56:59 GMT
In Delaware County, a man is charged with raping a woman. And what led to his arrest--her iPhone. Upper Darby police arrested 23-year-old Gaurave Kumar for sexually assaulting his ex-girlfriend.
In Delaware County, a man is charged with raping a woman. And what led to his arrest--her iPhone. Upper Darby police arrested 23-year-old Gaurave Kumar for sexually assaulting his ex-girlfriend.
Tuesday, June 18 2013 8:55 PM EDT2013-06-19 00:55:15 GMT
Bensalem police have arrested the suspect wanted for stabbing a man during a vehicle break-in. They previously released a series of suspect photos to help in the search.
Bensalem police have arrested the suspect wanted for stabbing a man during a vehicle break-in. They previously released a series of suspect photos to help in the search.
Tuesday, June 18 2013 6:58 PM EDT2013-06-18 22:58:16 GMT
Under a "doomsday" budget now being enacted, schools and students in the city of Philadelphia are facing devastating losses. Philadelphia is trying to convince the state not to let it happen.
Under a "doomsday" budget now being enacted, schools and students in the city of Philadelphia are facing devastating losses. Philadelphia is trying to convince the state not to let it happen.
Tuesday, June 18 2013 6:07 PM EDT2013-06-18 22:07:39 GMT
Published reports are saying this is a murder/suicide. The victim is 47 year old family practice doctor Michelle Liggio, and the alleged gunman is her estranged husband 58 year old Christopher.
Published reports are saying this is a murder/suicide. The victim is 47 year old family practice doctor Michelle Liggio, and the alleged gunman is her estranged husband 58 year old Christopher.
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