Easton, PA: Physicist sees three greenish discs
In summer 1948, physicist Carl A. Mitchell observed three glowing greenish discs passing over Easton, Pennsylvania, from north to south, one second apart. The sighting is documented in UFO evidence compilations.
Background
Witness and Observation
The physicist Carl A. Mitchell reported sighting three luminous, greenish discs. The objects crossed the sky above Easton, Pennsylvania, travelling from north to south. They appeared one after another at intervals of one second.
Details of the Event
The event took place in the summer of 1948. The discs were described as luminescent, which indicates a light source of their own. No further manoeuvres or sounds were mentioned, which characterises the observation as a rapid transit.
Significance
As a qualified physicist, Mitchell's report has been treated as credible. The precise description of colour, luminosity, and timing has been cited in support of its reliability. The event belongs to the early phase of UFO sightings following the 1947 wave and is cited in comprehensive UFO evidence collections (UFOEv, p. 49). It is notable as a civilian scientific observation.