Tennessee explosion, Accurate Energetic Systems, Humphreys County, explosives plant, ATF, mining explosives, earthquake, workplace disaster, OSHA, Holly Yan, CNNARTICLEAuthorities have confirmed that the massive blast that killed 16 workers at a Tennessee explosives plant earlier this month detonated between 24,000 and 28,000 pounds of explosives and was powerful enough to register as a 1.6 magnitude earthquake.The October 10 explosion occurred at Accurate Energetic Systems, a facility that produces military and demolition explosives about 60 miles west of Nashville. Investigators say the disaster began inside Building 602, a 15,000-square-foot structure that manufactured explosives for mining.“It really saddens me that we still have two souls that we have not been able to locate,” Humphreys County Sheriff Chris Davis said Friday. Fourteen of the 16 victims have been identified through rapid DNA testing, while searches continue for the remaining two.The blast scattered debris…..