"Mr. Patterson was teaching our history class and I was sitting next to the wall. And all of a sudden the wall started vibrating and the floor, it was almost like an optical illusion, it was like you saw a wave on the floor," Stevens said.
The Atomic Energy Commission actually picked the Tatum Salt Dome (now known as the Salmon Testing Site) out of more than 200 other potential salt domes.
10 a.m. on October 22, 1964: Betty Stevens, owner of the Purvis Antique Mall, was attending nearby Purvis High School.
That location, that time: the nuclear detonation drew crowds - all for a 5.3 kiloton yield test exploding 2,700 feet below ground surface.
Jim Craig with the MS State Dept. of Health adds that state scientists still perform quarterly tests at the site of aquifers, groundwater, and public water systems.