1999 Seville UFO sightings: five mysteries, little confirmation
In September 1999, a Spanish UFO researcher compiled five unexplained sightings in the sky around Seville; in August 2026 the Inexplicata blog republished the report in English translation, but the key official confirmation is still missing.
In September 1999, UFO researcher José M. García Bautista identified five cases in the area around Seville for which he found no obvious explanation even after investigating them. He had screened out fraudulent, confusing or rationally explainable reports beforehand, so the list contained only those he himself considered open questions. The report was translated into English by the Institute of Hispanic Ufology and republished by the Inexplicata blog on August 21, 2026.
In the first case, on September 4, 1999, near Puebla del Río, two witnesses, Juan Alcalde Moreno and Soledad Sánchez, saw a greenish, bouncing light moving in the sky for about 30 seconds; according to the researcher, a weather balloon is out of the question. Four days later, on September 8, in Alanís, Antonio Vargas observed orange points of light forming a triangle over a hill; they flew low and slowly, then, after passing over him, suddenly accelerated and disappeared high into the sky.
On September 9, three witnesses – María José Rodríguez, Francisco Ortega and María del Robledo García – saw a disc-like, brightly glowing cloud formation, estimated at 400–600 meters, at the Retortillo reservoir; according to García Bautista, this was probably a lenticular cloud, that is, an atmospheric phenomenon. On September 15, near Lebrija, two women, Rosa Montero and Pilar Castillo, spotted a cigar-shaped object roughly one hundred meters long that appeared motionless, arching over a field; the researcher notes that several similar reports had previously come in from the stretch of road between Lebrija and Rota.
The most contested case occurred on September 18 between Aznalcóllar and El Castillo de las Guardas, where Francisco López and Agustín Baena saw a light alternating between green, light blue and yellow-orange, moving along an angular path, in bad weather and heavy rain. According to the researcher, the area is part of the so-called "Magnetic Triangle," where recognized UFO researchers, among them Joaquín Mateos Nogales and Ignacio Darnaude Rojas, had previously reported similar sightings. According to García Bautista, the area lies close to the air corridor of Seville's San Pablo Airport, and Seville air traffic control confirmed that there were flights in the region on those days, although, by his account, not exactly along the indicated routes; however, he does not consider the object's irregular path and colors compatible with an airplane.
What we know for sure: all five cases were collected and evaluated by a single researcher, who excluded reports suspected of fraud or that could be explained according to his own methodology. What we don't know: the report mentions no photograph, recording or any independent measurement, and the researcher himself indicates that the confirmation he requested from the aviation authority (INTA) never reached him. The text was written in 1999 and republished in translation with unchanged content in 2026, so in the more than two decades since, no new data has publicly surfaced that would support or refute what was described.
The sober take
According to García Bautista's own analysis, the September 9 case is probably explained by a lenticular cloud, an atmospheric phenomenon, and for the September 4 light he ruled out a weather balloon; for the September 18 case, the airport air corridor and a perception error caused by the bad weather were also raised as possibilities, but the researcher did not consider this likely because of the object's irregular path.