UFO seen on radar in Guam in 1960

Summary

In September 1960, a military base in Guam recorded an object on radar approaching rapidly. It appeared at 20 miles and moved toward the base at an astonishing speed of 2880 knots, equivalent to over 3000 miles per hour. An observer briefly saw it with binoculars as a pale blue light, but lost contact when looking away. The radar crew noted the object made no sound and didn't follow a normal course, raising doubts it was a conventional aircraft.

Researchers concluded it could be anomalous propagation, a known phenomenon that creates false radar targets. Despite ruling out balloons, aircraft, and astronomical objects, the origin remained unidentified. The brief sighting and lack of additional data complicated the analysis. The case was filed as an unexplained phenomenon, but with a plausible explanation related to radar interference.