The force of the explosion was immense, and heavy debris was thrown as much as 3⁄4 miles (1.2 km) from the seat of the explosion. Huge granite blocks forming the tramway for carts outside the warehouse were flung over the church for two and three hundred yards into neighbouring streets and buildings. One is recorded as falling 400 yards (370 m) away through the roof of the Grey Horse pub. A stone of 20 stone (280 lb; 127 kg) weight damaged property in Oakwellgate. Large blocks of wood and stone were projected widely over Newcastle, reaching the west end of the quayside. The Courant newspaper office in Pilgrim Street was hit. A stone weighing 18.5 pounds (8.4 kg) fell through the roof of an opticians in Grey Street; when workmen discovered it in the morning it was still too hot to touch. A huge beam of timber, six feet long, was found on the roof of All Saint's Church. Another, ten feet in length and weighing 3 cwt (150 kg) landed on the Ridley Arms in Pilgrim Street; and others on the roof of a house in Moseley Street.
The reverberation of the explosion was heard at North Shields, 10 miles (16 km) distant, where residents thought the shock was an earthquake. Gas lights in a Jarrow paper mill were blown out. Light debris from the fire was scattered across 6 miles (10 km) of Gateshead and environs. Miners in Monkwearmouth colliery, the deepest in the country and 11 miles (18 km) away, heard the explosion and came to the surface, concerned as to the cause. 20 miles (30 km) westward at Hexham; 35 miles (56 km) north at Alnwick; and 40 miles (64 km) south at Hartlepool the explosion was heard distinctly; and for 20 nautical miles (37 km; 23 mi) out to sea. The light of the flames could be seen, reflected in the sky, 50 miles (80 km) away at Northallerton. And whilst the report of the explosion travelled so far, people on the scene were insensible of it. They describe themselves as having been lifted from their feet and dashed down, the violence completely stunning them; and when they awoke in a stupor they had only the dim idea of a rolling sound in their ears.
The explosion crater was measured to have a depth of 40 feet (12 m), and a diameter of 50 feet (15 m).