La Joya air base interception
On 11 April 1980 Peruvian Air Force pilot Oscar Santa María Huertas was scrambled in a Sukhoi Su-22 from La Joya, Arequipa, and fired on a balloon-like object that his cannon fire did not seem to affect.
1980 CE · -16.53, -71.86 · status: unexplained
The account
The object was first taken for a spy balloon or aircraft hovering near the base. Santa María said he fired a burst of 30 mm rounds, chased the object to high altitude and broke off when fuel ran low. A US Defense Intelligence report of June 1980 described the incident and called the object's origin unknown.
The sceptical view
The pilot's later retellings add details absent from the 1980 report. A stray research or surveillance balloon remains the conventional explanation, though none was identified.
The researched reading
A Peruvian fighter fired on a balloon-like object that it could not bring down. A balloon is the likeliest explanation; the dramatic manoeuvres rest on the pilot’s later retellings.
| Explanation | Weight | Why |
|---|---|---|
| Something known, misidentified | 40% | A round, shiny object hovering near the base and climbing out of a fighter’s reach is what a high-altitude balloon does; the pilot himself first thought it was a spy balloon, and missing a small target with a cannon burst at speed is easy. |
| Secret human technology | 21% | A foreign surveillance balloon or reconnaissance device over a Peruvian base with Soviet fighters in 1980 would be exactly what the Air Force first suspected. |
| Genuinely anomalous | 18% | The pilot reported rapid manoeuvres a balloon cannot make, and the DIA called the origin unknown, but his account is the only source for those manoeuvres. |
| Perception, memory or mind | 7% | The pilot’s later retellings added details (the object stopping, turning, a dome) absent from the 1980 report, the usual drift of memory. |
| Undetermined | 6% | The share a generic explanation had beyond what has been shown for this case: it fits many cases like this one, but has not been demonstrated for this one. |
| A known natural phenomenon | 3% | A daylight object fired upon is unlikely to be an optical effect. |
| A hoax or fabrication | 3% | The event is confirmed by a contemporary DIA report. |
| A poorly understood natural phenomenon | 2% | Nothing suggests a natural luminous effect. |
Official position: A June 1980 US DIA report described the incident and called the object’s origin unknown.