Case file · Official inquiry
The Vela incident
On 22 September 1979 a US Vela satellite recorded the characteristic double flash of a nuclear explosion over the southern Indian Ocean near the Prince Edward Islands.
1979 CE · -47.00, 40.00 · status: disputed
The account
A White House panel suggested a meteoroid strike on the satellite, but many scientists and later documents point to a secret Israeli–South African nuclear test.
The sceptical view
No nation has admitted a test; debris evidence is disputed.
The researched reading
A satellite recorded a nuclear-style double flash near South Africa. A secret low-yield nuclear test is the best explanation.
| Explanation | Weight | Why |
|---|---|---|
| Secret human technology | 80% | The double flash matched nuclear tests; reanalysis of the bhangmeter data and radionuclide and hydroacoustic evidence supports a low-yield test, probably Israeli, possibly with South African help. |
| A known natural phenomenon | 10% | A 1980 White House panel proposed a micrometeoroid hitting the satellite and scattering sunlit debris into the sensors, but no model reproduced the signal well. |
| Something known, misidentified | 6% | An instrument fault on the ageing satellite, misread as a nuclear signal, is possible; the satellite had known problems. |
| A poorly understood natural phenomenon | 2% | An unusual natural flash is unlikely given the signal’s shape. |
| A hoax or fabrication | 1% | A forged signal is implausible. |
| Genuinely anomalous | 1% | Nothing suggests an unknown phenomenon. |
| Perception, memory or mind | 0% | There were no human observers. |
Official position: A White House panel suggested a meteoroid strike; US intelligence agencies leaned towards a nuclear test, and no nation admitted one.