The “South Atlantic Flash,” or Vela Incident, occurred on September 22, 1979, when the Vela 6911 satellite detected a peculiar flash of light over the South Atlantic Ocean. This event alarmed U.S. officials, who speculated it might signify an illicit nuclear detonation, particularly due to the distinctive double flash characteristic of nuclear explosions.
President Jimmy Carter was informed, and later expressed a belief that Israel may have conducted a test explosion. A subsequent scientific panel in 1980, while not dismissing the nuclear hypothesis, suggested the flash could be explained by a small meteoroid striking the satellite, leading to controversy among experts.
By the early 2000s, classified documents revealed internal conflicts in the U.S. intelligence community about the incident. Some officials insisted the evidence pointed toward a nuclear explosion, implicating possible collaboration between South Africa and Israel.
Recent studies have reinvestigated the incident, supporting the notion of a nuclear detonation. However, an original panel member still maintains that the likelihood of a nuclear event was minimal. As investigations continue, the true cause and responsible parties remain a topic of significant debate.