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The explosion in southeastern New Hampshire involved more than 80 pounds of a legal explosive called Tannerite and blue chalk, and was set off around 7 p.m. Tuesday, April 20 at Torromeo Industries in Kingston, located on Dorre Road, Kingston Police Chief Donald Briggs said.
WBZ-TV shared footage of the explosion captured on a local resident's Ring Doorbell.
“A Kingston Police Detective met with individuals that were on site, who cooperated with the detective and informed him that they were having a gender reveal party,” authorities said in a statement.
“During the investigation, the detective was informed that the location, a quarry, was chosen as they felt it was a safe location to detonate the Tannerite.”
Residents several towns away said their houses were shaking from the explosion.
Oh, and in case you were wondering -- it's a boy.
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