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 peaks of sightings on August 9 and 11, 1946, occurred during the annual Perseid meteor shower. However, most sightings did not happen during meteor showers, and some showed features not typical of meteors, such as the ability to change direction.

Debate continues about the source of the unidentified ghost rockets. In 1946, many believed they came from the former German rocket site at Peenemünde and were tests by the Soviets of captured German V-1 or V-2 missiles or another early type of cruise missile, due to how they sometimes moved. This led the Swedish Army to issue a rule that newspapers should not report exact details, such as the location, direction, or speed of sightings. They believed this information was 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 ever found. Some sightings described objects that did not leave smoke trails, moved slowly, flew horizontally, moved together, or made no noise.

Most sightings showed fast-moving, rocket-shaped objects, sometimes with wings, that were visible for only a few seconds. Some reports described slower, cigar-shaped objects. A hissing or rumbling sound was sometimes heard.

Crashes were common and usually happened in lakes. Witnesses said objects crashed into lakes, sometimes floated across the surface before sinking. Swedish military divers searched the lakes after crashes but found only craters or broken plants on the lake bottom.

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 three-week search found no evidence of the object.

Karl-Gösta Bartoll, the officer who led the search, reported that the lake bottom had been disturbed but no object was found. He suggested the object may have broken apart during flight and was made of a lightweight material, like magnesium alloy, which would not show up on instruments. In 1984, Bartoll repeated that the object likely disintegrated in flight and that witnesses saw real objects.

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

On December 3, 1946, a memo for the Swedish Ghost Rocket committee noted nearly 100 impacts were reported, and 30 pieces of debris were examined by the Swedish National Defence Research Institute (FOA). Later, the debris was 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 physical objects" and all occurred during daylight.

U.S. involvement

In early August 1946, Swedish Lieutenant Lennart Neckman from 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 Dean Acheson, the Undersecretary of State, 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 reasons and unrelated to each other. Officially, Doolittle, then a vice-president of Shell Oil Company, was inspecting Shell offices in Europe, while Sarnoff, who had previously worked with General Dwight D. Eisenhower in London, was studying radio equipment markets. 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 about the rockets. (Carpenter chronology) Doolittle and Sarnoff were informed that ghost rockets had been tracked by radar on multiple occasions. On September 30, Sarnoff told the N.Y. Times he was "convinced that the 'ghost bombs' are no myth but real missiles."

On August 22, 1946, Lt. Gen. Hoyt Vandenberg, director of the Central Intelligence Group (CIG), wrote a Top Secret memo to President Truman. This memo, possibly influenced by information from Doolittle and Sarnoff, stated that evidence suggested the missiles originated from Peenemünde. A U.S. military attaché in Moscow had reportedly been told by a key Swedish Air Officer that radar tracking pointed to Peenemünde as the launch site. The CIG speculated the missiles were improved versions of V-1 rockets, likely tested near the Gulf of Bothnia and not aimed at intimidating Sweden. The missiles might have self-destructed using small explosives 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 space. This document was made public in 1997 and states:

The document also describes a search by a Swedish naval team for an object that crashed in a lake. They found a crater on the lake floor, which was thought to have been caused by the object. This may refer to a search in Lake Kölmjärv for a ghost rocket, though the exact date is unclear. The document ends by saying, "we are not completely dismissing this idea [that the objects came from space], but we are keeping an open mind about it."

Greek government investigation

The "ghost rocket" reports were not only seen in Scandinavian countries. Similar objects were also reported by British Army units in Greece, especially near Thessaloniki, in the next month. On September 5, 1946, Greece’s Prime Minister, Konstantinos Tsaldaris, said that many people saw strange objects flying over Macedonia and Thessaloniki on September 1. In mid-September, similar sightings were reported in Portugal, Belgium, and northern Italy.

The Greek government started its own investigation, led by physicist Paul Santorini. Santorini had helped develop a device used in the first A-bomb and held patents for missile guidance systems and radar technology. The Greek Army provided Santorini with a team of engineers to examine the objects, which were thought to be Soviet missiles flying over Greece.

In a 1967 speech to the Greek Astronomical Society, broadcast on Athens Radio, Santorini shared what he discovered during his 1947 investigation. He said, “We quickly found out they were not missiles. However, before we could do more, the Army, after talking with foreign officials (likely from the U.S. Defense Department), ordered the investigation to stop. Scientists from Washington came to Greece for secret meetings with me.” Later, Santorini told UFO researchers like Raymond Fowler that the secrecy was used because officials were worried about admitting the existence of a technology that could not be defended against.