1980·La Joya Air Base, Arequipa (Peru)
Peru.La Joya · a Peruvian fighter fires on an object
On April 11, 1980, at La Joya Air Base (Arequipa, Peru), Lieutenant Óscar Santa María Huertas scrambled in a Su-22 to intercept an object the base initially took for a spy balloon. By his testimony, he fired 64 rounds that the object seemed to absorb without damage, and it then moved away each time he locked onto it. Described as a cream-colored dome over a silver circular base about 10 meters across, it withstood 22 minutes of pursuit before hundreds of witnesses. The only contemporaneous document, from the U.S. defense attaché office in Lima, describes two sightings on May 9 and 10, and concludes that “its origin remains unknown.”
Tier B · IndicativeWhat do they mean? →
Limited evidence: a single witness, testimony gathered years later, or an account without contemporary primary documentation.
What it was
64%no known cause
The evidence is not enough to decide between the explanations
See the split across the six explanations
No known cause
Natural or human cause
What happened
On the morning of April 11, 1980, around 7:15 a.m., according to later accounts of the case, some 1,800 personnel assembled in formation in the yard of La Joya Air Base, in the Arequipa desert, observed a luminous spherical object hovering near the perimeter, a few kilometers away and at low altitude. Suspecting a foreign surveillance balloon over sensitive military facilities, the command ordered an interception. Lieutenant Óscar Santa María Huertas, about 23, took off in a Sukhoi Su-22 armed with 140 rounds of 30 mm cannon.
By his account, on his first approach he fired a burst of 64 rounds that formed "a wall of fire" over the object; none seemed to damage it, and the object absorbed the impact or dodged it with no visible effect. On the next three approaches, each time Santa María locked onto the object and was about to fire, it climbed or moved away at high speed and stopped again out of range, in a pattern the pilot read as deliberate evasion. He came, by his testimony, within about 90 meters of the object, close enough to describe it in detail. The pursuit, at varying altitudes and toward high levels, lasted about 22 minutes. Out of useful ammunition and low on fuel, the pilot returned to base.
The object, which he described as about 10 meters across, with a shiny cream-colored upper dome, like a light bulb cut in half, and a wide silver circular base, remained stationary in the sky for nearly two more hours, in view of hundreds of personnel.
No instrumental record survives: no gun-camera film or published radar tracks are preserved, and the Peruvian Air Force published no report. There is, however, a contemporaneous record, from another state: intelligence report IR 6 876 0146 80, "UFO sighted in Peru", prepared by Col. Norman H. Runge at the U.S. defense attaché office in Lima with a date of information of May 10, 1980, and received at the Joint Chiefs of Staff on June 3. Its source is an FAP officer "who observed the event". According to the report, the object was spotted on two occasions near Mariano Melgar Air Base at La Joya. The first was on the morning of May 9, when a group of officers in formation saw a UFO "round in shape, hovering near the airfield"; the air commander scrambled an Su-22 and the pilot, "according to a third party", intercepted it and fired upon it "at very close range without causing any apparent damage"; on a second attempt the UFO out-ran the Su-22.
The second occasion was in the early evening of May 10: the vehicle was lighted, another Su-22 was scrambled, and again it out-ran the aircraft. The originator added that he had heard discussion of the sighting from other sources: "apparently some vehicle was spotted, but its origin remains unknown". The report differs from the pilot's later account in the date (May 9 versus April 11) and in the number of sorties, and it conveys the firing second-hand. Santa María testified publicly for decades (including before international forums and in the U.S.) and kept to the essentials of his account.
Why it matters
There is a named officer, a military base as the setting and, by the accounts, hundreds of witnesses. The base's initial suspicion was a surveillance balloon from another state; what the pilot describes (an object that withstood 64 rounds and moved away each time he locked onto it) does not fit that suspicion.
The episode rests on Santa María's testimony, sustained for forty years, with no gun-camera film or published radar record to back it. Almost all the anomalous content (the absorbed fire, the evasion, the dimensions) comes from a single narrator. The only contemporaneous document, from another state, conveys the firing second-hand and differs from the pilot's account in the date and the number of sorties.
Documents and sources
Primary documents
USDAO Lima, intelligence information report IR 6 876 0146 80, 'UFO sighted in Peru' (received 3 June 1980, 2 pp.)
Cable from the US Defense Attaché Office in Lima to DIA, with date of information May 10, 1980 and a Joint Chiefs of Staff receipt stamp of June 3.
Read more
Its source is a Peruvian Air Force officer who saw the event: a round UFO seen on the morning of May 9 near Mariano Melgar air base at La Joya, against which an Su-22 was scrambled whose pilot, "according to a third party", fired at it at very close range with no apparent damage, and a second sighting on the evening of May 10 with another Su-22 outrun. It was prepared by Col. Norman H. Runge and approved by Capt. Vaughn E. Wilson. It is the only contemporary record of the case, and from another state.
Defense Intelligence Agency · respuesta FOIA (copia de The Black Vault, págs. 11-12 de «dia2ufo.pdf») · Public domain · US Government work · open original
Documented evidence
- U.S. defense attaché report from Lima, IR 6 876 0146 80 "UFO sighted in Peru" (received June 3, 1980): two sightings, May 9 and 10; Su-22 fired "at very close range without causing any apparent damage" according to a third party; the object out-ran the fighter both times; "its origin remains unknown"
- Decades-long sustained testimony of FAP lieutenant Óscar Santa María Huertas, the intercepting pilot; Interception in a Sukhoi Su-22 armed with 140 rounds of 30 mm; 64 fired in the first burst
- The object appeared to absorb or dodge the fire without damage and evaded the fighter's subsequent locks
- Pursuit of about 22 minutes at varying altitudes; the object remained stationary for nearly two hours after the pilot returned
- Hundreds of witnesses among La Joya Air Base (Arequipa) personnel
Show 3 more facts
- Object description: ~10 m, cream-colored upper dome like a cut light bulb over a silver circular base
- Initial institutional suspicion of a foreign surveillance balloon, ruled out by the observed behavior
- No known surviving instrumental record (no gun-camera film or published radar tracks)
Sources
- Enigma Labs — 'La Joya Air Force Base, Arequipa, Peru, April 11, 1980' — Case file with chronology and description of the object.
- Inexplicata (Journal of Hispanic Ufology) — 'Peru: La Joya AFB, The Perfect UFO Case (1980)' — Analysis of the case in Spanish-language ufology.
- Haines, R. F. & Vallée, J. — "Aerial Phenomena: Pilot Reports" (Journal of Scientific Exploration) — Scientific analysis of the La Joya / Santa María case (from the NARCAP archive).
- USDAO Lima — IR 6 876 0146 80, «UFO sighted in Peru» (DIA, recibido el 3 jun 1980), en la compilación DIA UFO Files 1980-1987 (The Black Vault) — Primary document: two sightings (May 9 and 10, 1980) and two Su-22 scrambles near Mariano Melgar Air Base; origin unknown.
Context (not images of the event)

Context · Arequipa (Peru), near La Joya where a FAP fighter fired at the object
The church and convent of San Francisco in the city of Arequipa, Peru, photographed at night in 2015. It is a context image of the region; La Joya Air Base lies in the desert outside the city and does not appear in it.
Complejo San Francisco, Arequipa, Perú, 2015-08-02, DD 79-81 HDR.JPG · Wikimedia Commons · CC BY-SA 4.0 · open original
Associated actors (2)
