The explosion happened Wednesday night in Boston's Dorchester neighborhood, the Globe reported.
At 9:45 p.m., the blackout cut power to the entire Globe building including the newsroom and press room.
Boston Globe Production Manager Larry Coan said the explosion disrupted service to one of the two electrical cables that feed into the building.
An NSTAR representative said the cause of the explosion and a resulting fire was under investigation. Power was restored just after 12:30 a.m. Thursday.
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