More than 16,000 people would be killed in Sunderland if a hydrogen bomb hit the city, a computer programme has predicted.
As North Korean officials claim that an underground hydrogen bomb test has been carried out in the country, we take a look at the impact a similar device would have in the unlikely event of it being detonated in Sunderland.
Computer programme Nukemap has estimated that 16,960 people would be killed in and around the city - while almost 30,000 would be injured.
Casualties could range from radiation doses to third degree burns.
These figures are for a 10 kiloton bomb - the yield which North Korea claims to have tested in a hydrogen device.
READ MORE: North Korea condemned as doubts voiced over 'H bomb' claims
Nukemap's results also show that the air blast radius would reach as up to 0.99 kilometres, stretching out towards Thornhill and the Stadium of Light.
Concrete buildings would be forced into collapse in these areas, and the fatalities would be widespread.
The radiation would have a radius of almost five kilometres squared - and if medical treatment is not provided, between 50 and 90% of people would die.
Dying could take any time from several hours to several weeks.
People more than six kilometres away would suffer third degree burns. This would affect Sunderland Docks, Hendon Industrial Estate and Deptford.