“The energy released at breakup is estimated to be equivalent to about 300 tons of TNT, which accounts for the loud noise,” it said.
NASA said its assessment was based on satellite observations and witness accounts submitted to the American Meteor Society.
Residents across eastern Massachusetts, including Boston and surrounding communities, reported hearing a powerful explosion-like sound earlier Saturday that rattled homes and prompted numerous calls to authorities.
Police and fire departments across the region said they received reports from concerned residents but found no immediate signs of damage or public safety threats.
Authorities said the sound was widely heard, while officials initially described its origin as unknown. No injuries or damage have been reported.
