Scientists are still trying to determine what caused a sonic boom that shook Columbia last week

For a few seconds on Saturday afternoon, people across the northeastern U.S. heard a loud explosion and felt buildings shake. It turned out that massive boom was not an earthquake. According to NASA,

A meteor expert says a Lexington home camera caught the likely culprit: an aircraft breaking the sound barrier, not a fireball from space.

Experts said a suspected earthquake that rattled portions of South Carolina was actually a sonic boom of unknown origins.

A loud boom was heard and felt across the Midlands on Thursday.

Two bases say it wasn't them. NASA reported no meteor. A leading theory: an aircraft went supersonic, and the sound bounced for miles.

A mysterious shaking in South Carolina has been identified. But its cause leaves more questions than answers. (AP Photo)

A sonic boom that shook the Midlands area was a scare and a shock for residents, many of which shared their reactions on social media.

NASA says the meteorite responsible for Saturday's sonic boom landed squarely in the middle of Cape Cod Bay.