The controlled detonation of a suspected World War Two bomb unearthed near Exeter University on Friday, occurred at 6.10pm, Saturday 27 February.
Upwards of 2,600 properties in the Glenthorne Road area, where the device was located, were evacuated by 10.30am yesterday and told to stay away from the area last night.
The 400-metre cordon will remain until further notice.
Devon County Council and Exeter Council have been working to support evacuated residents.
Around 400-tonnes of sand was transported to the site of the device, which is at a building site on private land, and walls were erected, initially by the Royal Navy bomb disposal experts, followed by Army personnel from the Royal Logistics Corps, to mitigate the impact of the detonation. Trenches were also dug to prevent ground shock.
Despite these mitigation measures, the impact of the blast has been significant and debris has been thrown at least 250-metres away. The crater is around the size of a double decker bus.
People can be reassured that there are no concerns regarding the impact of the explosion, which caused a large plume of sand, on public health.