Surface Burst vs Air Burst: Which Is More Dangerous?

Surface Burst vs Air Burst

The height at which a nuclear weapon detonates dramatically changes its effects. Our nuclear fallout calculator lets you compare both types.

A surface burst detonation occurs at or near ground level.

Advantages for the attacker:

Creates a crater, destroying underground bunkers

Maximizes radioactive fallout contamination

Best for hardened military targets

Effects on you:

Smaller blast and thermal radii

Massive radioactive fallout — the fireball vaporizes soil, creating highly radioactive particles

Fallout can travel hundreds of kilometers downwind

Contamination can last weeks to months

An air burst detonation occurs at an optimized altitude (typically 2-3 km for a 2MT weapon).

Advantages for the attacker:

Maximizes blast radius through Mach stem effect

Larger thermal radiation zone

Best for destroying cities and soft targets

Effects on you:

38% larger severe blast zone (5.8 km vs 4.2 km)

39% larger thermal zone (18.8 km vs 13.5 km)

Significantly less radioactive fallout

No crater formation

If you're close to ground zero: An air burst is more dangerous due to larger blast zones.

If you're far from ground zero: A surface burst is more dangerous due to extensive fallout contamination.

Check your nuclear fallout risk

Use our free calculator to see your survival rate