Cold War Incident • Broken Arrow • January 17, 1966

USA dropped nukes on Spain

An interactive cartographic reconstruction of the 1966 Palomares incident. A mid-air collision between a USAF B-52G bomber and a KC-135 tanker released four B28 thermonuclear weapons over the coast of Almería, Spain.

4 Hydrogen Bombs
5.8 MT Total Nuclear Yield
2 HE Detonations
880 m Subsea Depth (Alvin)

Impact & Recovery Sites

4 Weapons • Palomares, Spain
OPERATION CHROME DOME • SAC 1966

The Palomares Incident Narrative

On January 17, 1966, at 31,000 feet over the Mediterranean coast of Spain, a USAF Boeing B-52G Stratofortress carrying four B28FI Mod 2 Y1 thermonuclear bombs (1.45 megatons yield each) collided with a KC-135A Stratotanker during routine mid-air refueling.

The collision ripped both aircraft apart, killing all four tanker crew members and three of the seven bomber crew. The four nuclear weapons separated from the disintegrating fuselage and plummeted toward the coastal agricultural village of Palomares in Almería.

Bomb 1 (Riverbed): Parachute deployed successfully; weapon landed intact in soft gravel.
Bombs 2 & 3 (Land Impacts): Parachutes failed; conventional high explosives detonated on impact, aerosolizing weapons-grade plutonium over 2 km² of cropland.
Bomb 4 (Mediterranean): Splashed offshore; recovered after 80 days at 880 m depth by deep-submergence vehicle Alvin.
Bomb No. 1 Recovered Intact
Rio Almanzora Estuary (14 m above sea level)

Found intact in the dried riverbed of the Almanzora River. Parachute deployed correctly.

Equipped with a 16-foot ring-slot parachute which functioned flawlessly. Drifted into the soft gravel wash of the riverbed, approx. 1.5 miles north of Palomares. Recovered completely intact within hours.

Coordinates: 37.25417° N, 1.80306° W
Payload: 1.45 MT Thermonuclear Warhead
Bomb No. 2 Non-nuclear Detonation
Village (Tomato Patch) (22 m above sea level)

High explosives detonated on impact. Plutonium scattered, contaminating the area.

Parachute failed to deploy. High-velocity terminal impact directly into a cultivated tomato field east of the village center detonated the conventional high-explosive lens without nuclear yield. Radioactive plutonium-239 and americium-241 were aerosolized across urban streets and vegetable crops.

Coordinates: 37.24694° N, 1.79500° W
Payload: 1.45 MT Thermonuclear Warhead
Bomb No. 3 Non-nuclear Detonation
Village Outskirts (35 m above sea level)

High explosives detonated on impact. Created a crater and scattered radioactive material.

Parachute malfunctioned. The bomb struck a rocky ridge immediately north-northwest of the village. The conventional blast gouged a deep impact crater and distributed alpha-emitting plutonium dust downwind over agricultural plots.

Coordinates: 37.25139° N, 1.79694° W
Payload: 1.45 MT Thermonuclear Warhead
Bomb No. 4 Lost at Sea
Mediterranean Sea (-880 m (Subsea canyon))

Fell into the Mediterranean. Recovered after 80 days by the mini-sub Alvin.

Parachute partially opened. Local fisherman Francisco SimΓ³ Orts ('Paco el de la bomba') pinpointed the offshore splash site. A fleet of 34 US Navy vessels and the experimental submarine DSV Alvin hunted for 80 days. Found on March 17, 1966 on a steep underwater canyon face at 880 m depth, and lifted intact by CURV on April 7, 1966.

Coordinates: 37.16861° N, 1.68139° W
Payload: 1.45 MT Thermonuclear Warhead
2 Non-Nuclear Detonations (Plutonium dispersed)
1 Recovered Intact (Riverbed)
1 Lost at Sea (Alvin 880 m depth)
Click any bomb marker or card above to fly camera • Zero API keys required.