Silbury Hill
UK19910727_B27 July 1991·Silbury Hill, Wiltshire·wheat
Reported 27 July 1991 in wheat at Silbury Hill, Wiltshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 27 July 1991 (day precision)
- place
- Silbury Hill
Wiltshire
England - crop
- wheat
- size
- 190 ft (57.9 m) across
as written: 58 m | 190 ft - 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
- 51.415755, -1.857405
- 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 36.3 KiB image/jpeg |
image 3c54149a333c | https://www.cropcirclecenter.com/date/1991/199107.html |
Date
27 July 1991, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 27 July 1991
- weekday
- Saturday, day 208 of the year, ISO week 30, summer
- sun and moon
- 35.6 days after the June solstice; moon full (99% lit), 0.7 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
- 51.415755, -1.857405 — 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 | Wiltshire | England | 51.415755, -1.857405 place / os_open_names |
Crop and size
- crop
- wheat (cc: wheat)
- diameter
- 190 ft (57.9 m)
- size as written
- 58 m | 190 ft
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 | UK19910727_B |
| name | Silbury Hill |
| location | |
| county | Wiltshire |
| country | England |
| date reported | 1991-07-27 |
| date precision | day |
| crop | wheat |
| size | 58 m | 190 ft |
| diameter (ft) | 190 |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1991/199107.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/f5fa7755b6a51… raw record view: /formation/cc/f5fa7755b6a51fca6ab44ca3dc294ceb42ae318b792c9ee320113c0db9c5b7cd 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 3c54149a | ≈ none found | 4 | 1 | 0.903 | 0.1505 |
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 3c54149a— 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
- Roßdorf 26 July 1991, Roßdorf
- next
- Amesbury 28 July 1991, Amesbury
- previous in UK
- Lockeridge 25 July 1991
- next in UK
- Amesbury 28 July 1991
- same day
- Böklund (Böklund) · Callington (Callington) · Spaldwick (Spaldwick)
- within 7 days and 25 km
- Waden Hill 3 August 1991, 669 m away, 7 day(s) apart · Avebury Trusloe August 1991, 1.2 km away · Beckhampton 30 July 1991, 1.2 km away, 3 day(s) apart · Beckhampton 1 August 1991, 1.2 km away, 5 day(s) apart · Beckhampton 2 August 1991, 1.2 km away, 6 day(s) apart · Beckhampton August 1991, 1.2 km away · Avebury 1 August 1991, 1.4 km away, 5 day(s) apart · Avebury 2 August 1991, 1.4 km away, 6 day(s) apart · Avebury 3 August 1991, 1.4 km away, 7 day(s) apart · East Kennett 23 July 1991, 2.3 km away, 4 day(s) apart · Milk Hill 23 July 1991, 4.2 km away, 4 day(s) apart · Lockeridge 25 July 1991, 4.8 km away, 2 day(s) apart · Lockeridge 25 July 1991, 4.8 km away, 2 day(s) apart · Lockeridge 30 July 1991, 4.8 km away, 3 day(s) apart · Lockeridge 30 July 1991, 4.8 km away, 3 day(s) apart · Marlborough August 1991, 8.9 km away · Marlborough August 1991, 8.9 km away
In place
The nearest formations the archive can place.
Silbury Hill15 July 1988Silbury Hill
0 m away, 1988-07-15
Silbury Hill26 July 1988Silbury Hill
0 m away, 1988-07-26
Silbury Hill30 July 1988Silbury Hill
0 m away, 1988-07-30
Silbury Hill10 May 1989Silbury Hill
0 m away, 1989-05-10
Silbury Hill23 June 1989Silbury Hill
0 m away, 1989-06-23
Silbury Hill28 June 1989Silbury Hill
0 m away, 1989-06-28
- same county and year
- Alton Barnes April 1991 · Alton Barnes 18 April 1991 · Mardon Cowbag May 1991 · Yarnbury Castle 13 May 1991 · Marden 27 May 1991 · Whiteparish 27 May 1991 · Whiteparish 27 May 1991 · Whiteparish 27 May 1991 · Avebury Trusloe 9 June 1991 · Avebury Trusloe 14 June 1991 · Avebury Trusloe June 1991 · Beckhampton 18 June 1991 · Stonehenge 18 June 1991 · Beckhampton 20 June 1991 · Lockeridge 21 June 1991 · Avebury Trusloe 22 June 1991 · Blackland 28 June 1991 · Morgans Hill 28 June 1991 · Roundway Devizes 28 June 1991 · Lurkeley Hill 29 June 1991 and 67 more
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/UK19910727_B.json · row in index/manifest.jsonl
- input digests
- entity 21165a42a3ec · images 5256f0a44c09 · texts 4f53cda18c2b · geo 4447cc6f0722