Massive BOOM felt in Mississippi and Alabama about 10:30 AM Central time. Facebook reports seen from Gautier, Pascagoula, Escatawpa, and Moss Point, MS. Also reported felt in Semmes, AL.

Local news attributes it to possibly being from military exercises in the Gulf of Mexico.

https://www.wlox.com/2020/01/24/reports-loud-boom-is-not-an-earthquake-or-explosion-say-officials/