On the map
Famous waves
Well-known cases from the encyclopedia, with the sightings on this site from the same dates and area.
Found in our sightings
How they’re found
Every day the site looks at all the sightings that have a date and a place. When several different people report something within about 150 km of each other on the same night or the next — or a stretch of reports keeps coming from one area for weeks — and that’s clearly more than the area usually gets, it becomes a burst or a wave. Several posts from the same person count once, and a report that only names a country isn’t used.
The name, dates, place, shapes and numbers on each page are counted from its reports. A wave isn’t proof of anything unusual: satellites, rocket launches, drones and planes can all be seen by many people at once. Check What’s that light? for what was in the sky.
What is a UFO wave?
A wave (also called a flap) is a stretch of weeks or months when many more UFO reports than usual come from one area — like the Belgian wave of 1989–90 or the New Jersey drone sightings of late 2024.
What is a UFO burst?
A burst is a single night or a few days when several different people in the same area report something similar — like the Phoenix Lights on 13 March 1997.