In all, aside from the Capitol buildings, 13 buildings in the city remained evacuated, or "red tagged" as structurally unsound, and 14 were "yellow tagged," or closed until given a structural bill of health.
Workers had been evacuated from the "red zone" following the first aftershock, avoiding further casualties, said the Christchurch mayor, Bob Parker.
But there was still a story at the Moakley Federal Courthouse: around 3 15 PM, the courthouse was evacuated after a code-red announcement due to a bomb threat.
The authorities have declared a red alert and evacuated more than 4,000 people within a 20km (12 mile) radius.
Police announced a "code red alert" and evacuated some residences nearby but urged others to lock their doors.
They evacuated 94 Prince Street, a five-story red brick building that houses the Fanelli Cafe, a speakeasy during Prohibition that later catered to factory workers and painters before SoHo became fashionable.
Many supporters were not yet in the ground when fans were evacuated as security personnel announced "operation code red".
Farther north, police said five people were arrested on suspicion of entering areas evacuated due to the explosive wildfire around Redding.
And in Boston, the John Joseph Moakley United States Court House was evacuated in the afternoon as officials called out "code red" and bomb-sniffing dogs were sent inside.
Much of the island, including its capital, Plymouth, had already been evacuated before the volcano on June 25th sent rivers of red-hot rock and gas pouring at up to 200 kilometres an hour (125mph) through several villages to its north.
