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Seoul nuclear blast radius

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Seoul’s basin is dense, and the preset pin sits on the historic downtown around City Hall. A 15 kt airburst is neighbourhood-scale on that map, not a stand-in for a full-scale peninsula war.

Open Seoul in the 3D simulator

Educational estimate only. Blast and heat rings use simplified yield scaling. They ignore terrain, weather, shielding, and weapon design. Casualty counts use WorldPop 2020 residents on an approximately 1 km grid and ignore time of day, commuting, shelter, and evacuation. This is not a targeting or civil-defense tool. About the model.

Aim point: Seoul City Hall / Jung District · Weapon: Little Boy (15 kt, 543 m (1,780 ft) optimum airburst)

Ground ranges for Little Boy (15 kt, 543 m (1,780 ft) optimum airburst) in this simulator.
Effect Ground range What the model means
Fireball 266 m (872 ft) Maximum luminous radius
20 psi 839 m (2,751 ft) Heavy destruction
5 psi 1.8 km (1.1 mi) Most buildings collapse
Thermal 2.0 km (1.3 mi) 3rd-degree burns
1 psi 4.2 km (2.6 mi) Windows shatter
Rings scaled to 1 psi. Yellow fireball, red 20 psi, orange 5 psi, gold thermal, blue 1 psi. Not a map of buildings.

Casualty estimate at this pin

People on the WorldPop 2020 grid inside this scenario’s 1 psi ring. Rounded educational estimate, not a forecast.
Estimated deaths 64,988
Estimated injuries 178,516
Residents inside 1 psi 649,710

What the rings cover

Inner rings sit on Jung-gu’s civic and commercial core. 5 psi covers a portion of downtown Seoul. 1 psi reaches toward neighbouring districts and still leaves most of the metro and the river basin outside window-breakage in this model.

People search Seoul in nuke simulators because of geopolitics. This page does not model missile inventories, targeting, or civil defense. It shows one yield on one downtown point with the same rings as every other city page.

The Han River and the mountains that frame the basin are why 3D helps. A flat circle does not show how quickly elevation and water interrupt a mental picture of ‘the whole city.’

If you need a larger yield for comparison, the W87 and W88 pages link back here. The default stays Little Boy so Seoul can be compared with Tokyo and Shanghai on an equal footing.

Related pages

Tokyo · Shanghai · New York · London

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City index · Historic sites · Weapon yields

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