Patterns in the Archive
Every event in this archive carries a year, a place, and a phenomenon type — which means the archive itself is a dataset. Read as one, 5,483 records tell a story that no single case can: waves and droughts, panics and quiet decades, and the unmistakable fingerprint of who was writing things down. One honest caveat before the charts: this data measures documentation, not phenomena. A spike means more reports survived — because a newspaper covered them, an agency filed them, or a government declassified them — not necessarily that more happened.
Two centuries of records
The long view shows two mountains and a foothill range. The first mountain is the 1940s — 1,009 events, driven overwhelmingly by a single year: 1947, when Kenneth Arnold's June sighting gave the world the phrase "flying saucer" and the FBI and Army Air Forces started filing everything that came in. The second is the 2020s, and it is an archive artifact of the best kind — the 2026 PURSUE declassifications dropped thousands of government case files into the public record, and several hundred of the dated ones land in this decade. Between them sit the steady foothills of the classic UFO era and the older, thinner strata of Victorian hauntings and newspaper poltergeists.
View this data as a table
| Decade | Documented events |
|---|---|
| 1850s | 43 |
| 1860s | 51 |
| 1870s | 56 |
| 1880s | 50 |
| 1890s | 59 |
| 1900s | 104 |
| 1910s | 68 |
| 1920s | 85 |
| 1930s | 76 |
| 1940s | 1,009 |
| 1950s | 731 |
| 1960s | 507 |
| 1970s | 297 |
| 1980s | 200 |
| 1990s | 170 |
| 2000s | 140 |
| 2010s | 153 |
| 2020s | 483 |
The classic era, year by year
Zoom into 1940–1979 and the folklore becomes visible as data. The 1947 spike — 570 events in one year — is the original flying-saucer summer. The 1952 crest is the Washington, D.C. radar flap that put jets over the capital and led directly to the CIA's Robertson Panel, the origin of official debunking. The late-1960s bump spans the Michigan "swamp gas" controversy and the wave that pushed Congress to commission the Condon Report. After 1969, Project Blue Book closes — and the filings collapse with it. The lesson cuts both ways: the waves were real events in the documentary record, and the record was always downstream of whether an institution existed to receive reports.
View this data as a table
| Year | Documented events |
|---|---|
| 1940 | 19 |
| 1941 | 8 |
| 1942 | 21 |
| 1943 | 17 |
| 1944 | 15 |
| 1945 | 25 |
| 1946 | 18 |
| 1947 | 570 |
| 1948 | 168 |
| 1949 | 148 |
| 1950 | 137 |
| 1951 | 45 |
| 1952 | 167 |
| 1953 | 66 |
| 1954 | 75 |
| 1955 | 41 |
| 1956 | 45 |
| 1957 | 70 |
| 1958 | 48 |
| 1959 | 37 |
| 1960 | 55 |
| 1961 | 48 |
| 1962 | 23 |
| 1963 | 34 |
| 1964 | 60 |
| 1965 | 61 |
| 1966 | 79 |
| 1967 | 81 |
| 1968 | 31 |
| 1969 | 35 |
| 1970 | 28 |
| 1971 | 26 |
| 1972 | 26 |
| 1973 | 40 |
| 1974 | 26 |
| 1975 | 34 |
| 1976 | 27 |
| 1977 | 44 |
| 1978 | 15 |
| 1979 | 31 |
What kind of strange
UFO and UAP cases account for 57% of the archive — a share that has grown sharply since the PURSUE ingests, because governments declassify aerial encounters, not hauntings. Strip the disclosure corpus away and the older archive is far more evenly split between ghosts, cryptids, and the unclassifiable. That asymmetry is itself a finding: the paranormal that governments document is almost exclusively the kind that shows up on radar.
Who declassified what
The 2,368 records in the disclosure corpus carry their source agency, and the distribution says as much about bureaucracy as about the sky. The FBI dominates because the Bureau was the dumping ground for civilian saucer reports in the late 1940s — and because the June 2026 tranche added its modern case files. AARO's share is the Pentagon's contemporary reporting pipeline. The thin CIA and Department of Energy tails are the most closely held files, and the ones every future tranche is watched for.
View this data as a table
| Agency | Declassified records |
|---|---|
| FBI | 1,095 |
| AARO | 562 |
| Department of War | 203 |
| USAAF | 187 |
| USAF | 163 |
| NASA | 40 |
| U.S. Air Force | 30 |
| CIA | 23 |
Reading the pattern honestly
Three things in this data are solid. Report waves are real and cluster hard — 1947 alone holds more records than the entire nineteenth century. Institutions drive the record — every major spike coincides with a body that collected reports, from the Army Air Forces to AARO. And declassification is now the largest force shaping what the public record contains, which is why this archive tracks each PURSUE release as it lands. What the data cannot tell you is what any of these reports were. For that there is only the case-by-case work — the documents, the witnesses, and the standard of evidence each reader brings. Start anywhere: the full archive, the map, or what happened on this day.