There have been several mysterious “booms” affecting residents in California’s Gold Country. It now appears that a military installation over 100 miles away is the cause.
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The Hawthorne Army Depot routinely destroys obsolete munitions on weekdays between the hours of 11:00 a.m. and 2:00 p.m—the period of time when many of the nearly 2,300 members of the Facebook group “Mother Lode Mystery Booms” have reported hearing the blasts.
Glen White, a science instructor at Columbia College outside Sonora, said the sound coming from Hawthorne appears to carry especially well in the summer months.
“I can’t explain all the physics involved, but the atmosphere is bouncing in response to the energy and it’s reflecting and bouncing (the sound) back down,” White said. “The really odd part is people fairly close to the source of the energy, the explosions, aren’t hearing it.