Tap the map to set a target, then press DETONATE or PULSE.
An educational tool visualizing approximate effects of nuclear detonations and EMP events. All calculations use publicly available physics models and declassified research.
Blast radii derive from cube-root scaling laws. Fireball: R = 0.033 × Y^0.4 km. Overpressure uses Glasstone & Dolan models ("The Effects of Nuclear Weapons", 1977). Thermal radiation follows inverse-square law. Casualties use zone area × population density with Hiroshima/Nagasaki survival rates.
HEMP has three phases: E1 (nanoseconds), E2 (microseconds–milliseconds), E3 (seconds–minutes). E1 peak ≈ 50 kV/m. Affected radius from burst altitude: R = √(2 × Rₑ × h). Field decays with distance, modulated by geomagnetic latitude.
This is an approximation. Real effects depend on terrain, weather, construction, shielding, and weapon design. Population data is estimated. Not for actual emergency planning.
Historical markers include known nuclear tests and EMP events. The 1962 Starfish Prime test (1.4 Mt at 400 km over Johnston Atoll) caused electrical damage in Hawaii 1,400 km away.