A loud sonic boom was heard and felt across North Alabama – from Blount, Jefferson, Walker, Cullman, Talladega, Calhoun, Clay, Winston, Randolph, Tuscaloosa, and St. Clair counties, but also in Columbus, Mississippi – shortly after 13:40 CST (19:40 UTC) on November 14, 2017. At this time, NASA was only able to say: the origin of large boom over Alabama is a mystery.

Bama booms detected on a seismograph in Cleburne County… https://t.co/QRhl5CdpYm — James Spann (@spann) November 14, 2017

Re: loud boom heard: we do not see anything indicating large fire/smoke on radar or satellite; nothing on USGS indicating an earthquake. We don’t have an answer, and can only hypothesize with you. 1) sonic boom from aircraft; 2) meteorite w/ current Leonid shower? — NWS Birmingham (@NWSBirmingham) November 14, 2017

@spann I heard and felt an incredibly loud boom from inside my home in Moody around 1:40-1:45pm today. Shook the entire house. Any news? Thanks! #boom — Jeff Harbison (@JeffSellsHouses) November 14, 2017

NASA scientists in Huntsville, Alabama, said that the origin of a mysterious boom that rocked central Alabama earlier Tuesday “remains unclear,” but have already ruled out a fireball sonic boom… Although the sky was on fire yesterday.

This is what officials know so far:

1. Seismic data from the U.S. Geological Survey’s Lakeview Retreat near Centreville, Alabama, show a fairly loud boom occurring on or before 13:39 CST.

2. The Elginfield Infrasound Array in southern Ontario 965 km (600 miles) from North Alabama “picked up a matching infrasound signal beginning at 14:02 and lasting around 10 minutes.” NASA said the signal “could have been generated by a bolide, larger supersonic aircraft or a ground explosion.”

3. Eyewitnesses reported a vapor trail, and NASA said that points to a meteor or aircraft.

The mystery boom phenomenon continues.

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