A spectacular explosion spewed chunks of concrete and bedrock as high as eight stories when an underground dynamite blast on the Second Ave. subway project went stunningly awry.
The eruption happened at 12:45 p.m. Tuesday, turning the intersection of E. 72nd St. and Second Ave. on the upper East Side into what appeared to be a war zone.
Miraculously, no one was injured by the volcano-like scare in a fenced-off construction site on the northwest corner of the intersection.
MTA workers had blocked traffic from entering the intersection before the blast, a routine precaution that likely saved lives.
The MTA quickly quelled any fears of terrorism, saying the ferocious boom was the result of a controlled underground blast that clearly got out of control.
Investigators were looking into whether blast-containment material was in the right place when workers set off the charge at a 35-degree angle, sources told the Daily News.
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