Knebworth
UK19930816_A16 August 1993·Knebworth, Hertfordshire
Reported 16 August 1993 at Knebworth, Hertfordshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 16 August 1993 (day precision)
- place
- Knebworth
Hertfordshire
England - crop
- not recorded by any source
- size
- not recorded
- recorded by
- cc
- images
- 1 · 1 diagram
- writing
- nothing was written about this formation on any source
Also called
Nothing else. No other name or place string appears on any source record for this formation.
Where exactly
- coordinate
- 51.865535, -0.182868
- how it was got
- os open names
place, to within 2,000 m, from the cc record - on a map
- OpenStreetMap
No source publishes a coordinate for any formation in this archive. Every coordinate here is derived from the place name a source printed, and this page says how precise that makes it rather than rounding it away.
Images
1 image(s) on this formation's own source records. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.
Diagrams (1)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | diagram | cropcirclecenter.com / Bertold Zugelder | site default | 575×415 40.2 KiB image/jpeg |
image 4f389146b2cb | https://www.cropcirclecenter.com/date/1993/199308.html |
Date
16 August 1993, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 16 August 1993
- weekday
- Monday, day 228 of the year, ISO week 33, summer
- sun and moon
- 37.5 days before the September equinox; moon waning crescent (3% lit), 14.0 days after the full moon (computed at 12:00 UTC; a reported date is a discovery date, not a creation date)
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 51.865535, -0.182868 — place, ±2,000 m, by os_open_names, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Hertfordshire | England | 51.865535, -0.182868 place / os_open_names |
Crop and size
crop and size not recorded by any source
Source records
What each source published, side by side. A row whose values differ across the sources is marked: the archive prints the disagreement rather than choosing a winner.
| field | cc cropcirclecenter.com |
|---|---|
| id / slug | UK19930816_A |
| name | Knebworth |
| location | |
| county | Hertfordshire |
| country | England |
| date reported | 1993-08-16 |
| date precision | day |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1993/199308.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/1ff82e082f080… raw record view: /formation/cc/1ff82e082f08049826f1fe57dc279c7d881a8a81544992a8d2df74c023fa74c1 in the preview app |
Texts
no text documents in the archive for this formation
Claims about this formation
no claim was extracted from a text about this formation
Geometry
1 diagram file(s) on this page. measured from the diagram itself, and experimental: the extractor's rotational order is right on 88.8 % of a 200-diagram hand-labelled set against a gate of 90 %, so read a number here beside the picture rather than instead of it.
| diagram | rotational symmetry | elements | rings | mirror | fill |
|---|---|---|---|---|---|
| cc 4f389146 | ≈ continuous (concentric circles) | 1 | 1 | 0.999 | 0.3275 |
Experimental, and marked ≈ wherever it appears. These numbers are read off a drawing, not off the field: the extractor's rotational order agrees with a hand-labelled set on 88.8 per cent of 200 diagrams against a gate of 90 per cent, its element count is within one on 97.5 per cent, and its ring count is not calibrated at all. Nothing in the analysis tree is derived from the rotational order while that gate is unmet.
Diagrams that look like these: cc 4f389146— the nearest by perceptual hash. The whole archive is browsable by shape in the shape section, and this formation's own diagrams go straight into that grid: show them in the grid.
Neighbours
In time
- previous
- Silbury Hill 13 August 1993, Silbury Hill
- next
- East Kennett 17 August 1993, East Kennett
- previous in UK
- Silbury Hill 13 August 1993
- next in UK
- East Kennett 17 August 1993
- same day
- Zaisertshofen (Zaisertshofen) · Knebworth (Knebworth)
- within 7 days and 25 km
- Knebworth 16 August 1993, 0 m away, 0 day(s) apart
In place
The nearest formations the archive can place.
Knebworth16 August 1993Knebworth
0 m away, 1993-08-16
Aston4 July 2006Aston
3.1 km away, 2006-07-04
Codicote28 July 1989Codicote
4.1 km away, 1989-07-28 Walkern30 June 1997
Walkern
6.8 km away, 1997-06-30
Sacombe4 July 2006Sacombe
8.0 km away, 2006-07-04
Little Wymondley7 August 1990Little Wymondley
8.2 km away, 1990-08-07
- same county and year
- Potters Bar 27 June 1993 · Rickmansworth 27 June 1993 · Knebworth 16 August 1993
Provenance
- entity built at
- 2026-09-11T19:20:39Z (derived from the link decisions, not from this build)
- index run ids
- none
- reviews applied
- none
- open queue pairs
- none
- entity record
- index/formations/UK19930816_A.json · row in index/manifest.jsonl
- input digests
- entity 4308ff7cd6c4 · images b78a79608588 · texts 4f53cda18c2b · geo c7256ffbceb2