So what, exactly, is Tannerite?
Tannerite is an over-the-counter, explosive target used for firearms practice and sold in kit form. It is made by mixing aluminum powder with ammonium nitrate.
Law enforcement experts say 80 pounds is enough to cause significant damage to a home.
Did the explosion cause any damage?
Nearby residents said the blast rocked their homes. Some reported property damage.
“We heard this god-awful blast,” Sara Taglieri, who lives in a home that abuts the quarry, told NBC10 Boston. “It knocked pictures off our walls … I’m all up for silliness and what not, but that was extreme.”