Ghost rockets (Swedish: Spökraketer, also called Scandinavian ghost rockets) were rocket or missile-shaped unidentified flying objects first seen in 1946, mainly in Sweden and other Scandinavian countries, including Finland.

The first reports of ghost rockets were made on February 26, 1946, by Finnish observers. About 2,000 sightings were recorded between May and December 1946, with the most sightings on August 9 and 11, 1946. Scientists confirmed 200 of these sightings using radar, and authorities found physical pieces that were linked to ghost rockets.

Studies suggested that many ghost rocket sightings were likely caused by meteors. For example, the high number of sightings on August 9 and 11, 1946, matched the peak of the annual Perseid meteor shower. However, most sightings did not happen during meteor showers, and some showed features not typical of meteors, such as reported movement.

People still debate where the ghost rockets came from. In 1946, many believed they were launched from the former German rocket site at Peenemünde and were tests by the Soviet Union of captured German V-1 or V-2 missiles or other early missiles. This led the Swedish Army to give instructions that newspapers should not share exact details like the location, direction, or speed of sightings. They believed this information was important for evaluating the tests.

Descriptions and early investigations

The early Soviet origins theory was not accepted by Swedish, British, and U.S. military investigators because no rocket pieces were found, and some sightings described objects that left no smoke, moved slowly, flew level, traveled in groups, or made no noise.

Most sightings showed fast-moving objects shaped like rockets or missiles, seen for only a few seconds. Some objects were slower and long and narrow. A hissing or rumbling sound was sometimes heard.

Crashes happened often, usually in lakes. People reported objects falling into lakes, then moving across the surface before sinking. Swedish military divers searched the lakes after crashes but found only craters or broken plants.

The most famous crash happened on July 19, 1946, in Lake Kölmjärv, Sweden. Witnesses saw a gray, rocket-shaped object with wings crash into the lake. One person heard a loud noise, possibly from an explosion. A military search for three weeks found no evidence.

After the search, Swedish Air Force officer Karl-Gösta Bartoll wrote a report stating the lake bottom was disturbed but no object was found. He suggested the object may have broken apart, possibly made of a light material like magnesium alloy that would not show up on instruments. In 1984, Bartoll told researcher Clas Svahn that the object likely broke apart during flight and that people saw real objects.

On October 10, 1946, the Swedish Defense Staff said most reports were unclear and should be doubted. However, some clear sightings could not be explained as natural events, Swedish planes, or imagination. Radar and other equipment recorded signals but did not identify the objects. The staff also said fragments claimed to be from missiles were actually ordinary materials like coke or slag.

On December 3, 1946, a memo for the Swedish Ghost Rocket committee stated about 100 impacts were reported, and 30 pieces of debris were examined. These were later identified as meteorite fragments. Of nearly 1,000 reports received by November 29, 225 were considered sightings of real objects, all seen during the day.

U.S. involvement

In early August 1946, Swedish Lieutenant Lennart Neckman from the Defense Staff's Air Defense Division saw something that was "without a doubt … a rocket projectile." On August 14, 1946, the New York Times reported that Undersecretary of State Dean Acheson was "very much interested" in the ghost rocket reports, as was U.S. Army Air Forces intelligence, as later documents showed. On August 20, the Times reported that two U.S. experts on aerial warfare, General James Doolittle and General David Sarnoff, president of RCA, arrived in Stockholm, seemingly on private business and independently of each other. The official explanation was that Doolittle, who was now a vice-president of the Shell Oil Company, was inspecting Shell branch offices in Europe, while Sarnoff, a former member of General Dwight D. Eisenhower's London staff, was studying the market for radio equipment. However, the Times story stated that the head of the Swedish Defense Staff made no secret that he "was extremely interested in asking the two generals' advice and, if possible, would place all available reports before them." Doolittle and Sarnoff were told that the ghost rockets had been tracked on radar. Sarnoff was quoted by the N.Y. Times on September 30 saying that he was "convinced that the 'ghost bombs' are no myth but real missiles."

On August 22, 1946, the director of the Central Intelligence Group (CIG), Lieutenant General Hoyt Vandenberg, wrote a Top Secret memo to President Truman, perhaps based in part on information from Doolittle and Sarnoff. Vandenberg stated that the "weight of evidence pointed to Peenemünde as the origin of the missiles," that the U.S. military attaché in Moscow had been told by a "key Swedish Air Officer" that radar tracking led to the conclusion that Peenemünde was the launch site. The CIG speculated that the missiles were improved versions of the V-1 being aimed for the Gulf of Bothnia for test purposes and did not overfly Swedish territory specifically for intimidation; they self-destruct using a small explosion or by burning.

Nevertheless, there are no reports of rocket launches at Peenemünde or the Greifswalder Oie after February 21, 1945.

Swedish military opinion

Although the official views of the Swedish and U.S. military are still not fully known, a Top Secret USAFE (United States Air Force Europe) document from November 4, 1948, suggests that some investigators thought the ghost rockets and later "flying saucers" might have come from space. This document was made public in 1997 and includes the following information:

It also describes a search by a Swedish naval team for an object that crashed in a lake. The team found a new crater on the lake floor, which may have been caused by the object. This could be related to a search for a ghost rocket in Lake Kölmjärv, though the exact date is not clear. The document ends with the statement: "We are not completely dismissive of this somewhat interesting idea [that the objects came from space], and we remain open to considering the possibility."

Greek government investigation

The "ghost rocket" sightings were not only reported in Scandinavian countries. In early September 1946, British Army units in Greece, particularly near Thessaloniki, also saw similar objects. On September 5, 1946, Greece’s Prime Minister, Konstantinos Tsaldaris, stated that projectiles had been spotted over Macedonia and Thessaloniki on September 1. Later that month, similar objects were reported in Portugal, followed by sightings in Belgium and northern Italy.

The Greek government launched its own investigation, led by physicist Paul Santorini. Santorini had worked on the proximity fuze used in the first atomic bomb and held patents for guidance systems in Nike missiles and radar technology. The Greek Army provided Santorini with a team of engineers to examine objects believed to be Soviet missiles flying over Greece.

In a 1967 lecture to the Greek Astronomical Society, broadcast on Athens Radio, Santorini shared findings from his 1947 investigation. He said, “We quickly found that the objects were not missiles. However, the Army, after discussing with foreign officials (likely from the U.S. Defense Department), ordered the investigation to stop. Scientists from Washington traveled to Greece for secret meetings with me.” Later, Santorini told UFO researchers like Raymond Fowler that the secrecy was due to officials fearing the discovery of a technology that could not be defended against.