Sources are generally listed for each entry, these will attribute a UFO sighting to news media reportage, civilian UFO research organizations, U.S.Air Force Project Blue Book investigations, or other individual researchers who document sightings.

In certain cases, more information regarding a specific incident may be available which will furnish additional information to the reader. When this is available, a link will be provided that will direct the reader to the information.

NOTE: Be strongly advised that many UFO reports are explainable, and with such databases, there is a high probability that dubious and mistaken reports can and will be submitted. Such 'noise' can clutter the unexplained reports from the explainable reports, creating a quagmire of confused data. In seeking to clarify certain reports, sometimes a presumed explanation may appear where so applicable. Although this database can be used for study and scrutiny, it is not a scientific compilation of material.