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. Two hundred of these sightings were confirmed 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 times when the sightings peaked matched the time when the Perseid meteor shower was active in 1946. However, most sightings did not happen during meteor showers, and they showed features that did not match meteors, such as reported movement that changed direction.

People still debate where the ghost rockets came from. In 1946, many believed they came 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 another early type of missile because of how they sometimes moved. This led the Swedish Army to issue a rule that newspapers should not report the exact location, direction, or speed of ghost rocket sightings, as this information was considered important for evaluating the tests.

Descriptions and early investigations

Military investigators from Sweden, the United Kingdom, and the United States did not believe the early Soviet origins theory because no rocket pieces were found. Some sightings described objects that left no smoke, moved slowly, flew horizontally, moved together, and made no noise.

Most sightings showed fast-moving objects shaped like rockets or missiles, with or without wings, visible for only a few seconds. Some reports described slower, cigar-shaped objects. A hissing or rumbling sound was sometimes heard.

Crashes often happened in lakes. Witnesses said objects crashed into lakes, then moved across the water before sinking. Swedish military divers searched the lakes after crashes but found only craters or broken plants.

The most famous crash occurred 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 an explosion. A military search for three weeks found nothing.

Karl-Gösta Bartoll, the officer who led the search, reported that the lake bottom was disturbed, but no object was found. He suggested the object might have broken apart in the air and was made of a light material, like magnesium alloy, which would not show up on instruments. In 1984, Bartoll confirmed that the investigation showed the object likely broke apart during flight and that witnesses saw real objects.

On October 10, 1946, the Swedish Defense Staff said most sightings were unclear but some were real and could not be explained by natural events, aircraft, or imagination. Radar and other equipment detected 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.

A memo from December 3, 1946, stated nearly 100 crashes were reported and 30 pieces of debris were examined. The debris was later identified as meteorite fragments. By November 29, the Swedish Defense Staff had received nearly 1,000 reports, of which 225 were considered sightings of real objects, all seen during the day.

U.S. involvement

In early August 1946, Swedish Lieutenant Lennart Neckman of the Defense Staff's Air Defense Division saw something he described as "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 reports about mysterious rockets, as was U.S. Army Air Forces intelligence, according to later documents (Clark, 246). On August 20, the Times noted that two U.S. experts on aerial warfare, General James Doolittle and General David Sarnoff, president of RCA, arrived in Stockholm. They claimed their visit was for private business, unrelated to each other. Officially, Doolittle, who was then a vice-president of Shell Oil Company, was inspecting Shell offices in Europe, while Sarnoff, a former member of General Dwight D. Eisenhower's London staff, was studying the radio equipment market. However, the Times reported that the Chief of the Swedish Defense Staff openly expressed interest in seeking the generals' advice and sharing all available reports with them (Carpenter chronology). Doolittle and Sarnoff were informed that ghost rockets had been tracked by radar on several occasions. Sarnoff later told the N.Y. Times on September 30 that he was "convinced that the 'ghost bombs' are no myth but real missiles."

On August 22, 1946, Lieutenant General Hoyt Vandenberg, director of the Central Intelligence Group (CIG), wrote a Top Secret memo to President Truman. This memo may have been based in part on information from Doolittle and Sarnoff. Vandenberg stated that evidence suggested the rockets originated from Peenemünde. He noted that a U.S. military attaché in Moscow had been told by a "key Swedish Air Officer" that radar tracking pointed to Peenemünde as the launch site. The CIG speculated that the rockets were extended-range versions of the V-1 missile, possibly tested near the Gulf of Bothnia, and that they did not intentionally fly over Swedish territory to intimidate. It was also believed the rockets might self-destruct using small charges or by burning.

However, there are no records of rocket launches at Peenemünde or the Greifswalder Oie after February 21, 1945 (See also: List of V-2 test launches).

Swedish military opinion

A Top Secret USAFE (United States Air Force Europe) document from 4 November 1948 suggests that some investigators thought the ghost rockets and later "flying saucers" might have come from outer space. This document was made public in 1997. It describes a search by a Swedish naval team for an object that had crashed in a lake, where they found a crater on the lake floor that was not known before. This may refer to a search in Lake Kölmjärv for a ghost rocket, though the exact date is not clear. The document concludes by stating that "we are not completely dismissing this interesting idea [that the objects had extraterrestrial origins], while remaining open to other possibilities."

Greek government investigation

The "ghost rocket" sightings were not only reported in Scandinavian countries. Similar objects were also seen in early October 1946 by British Army units in Greece, particularly near Thessaloniki. On September 5, 1946, Greece's Prime Minister, Konstantinos Tsaldaris, stated that many people in Macedonia and Thessaloniki had seen strange objects in the sky on September 1. By mid-September, similar sightings were reported in Portugal, Belgium, and northern Italy.

The Greek government did 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 him with engineers to examine the objects, which were believed to be Soviet missiles flying over Greece.

In a 1967 speech to the Greek Astronomical Society, broadcast on Athens Radio, Santorini shared details from his 1947 investigation. He said, "We quickly found out they were not missiles. However, before we could learn more, the Army, after talking 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 advanced technology that we could not defend against.