Hackpen Hill
UK19910704_C4 July 1991·Hackpen Hill, Wiltshire·wheat
Reported 4 July 1991 in wheat at Hackpen Hill, Wiltshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 4 July 1991 (day precision)
- place
- Hackpen Hill
Wiltshire
England - crop
- wheat
- size
- 213 ft (64.9 m) across
as written: 65 m | 213 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
- 51.468306, -1.815723
- 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 43.0 KiB image/jpeg |
image bc7afa8e39aa | https://www.cropcirclecenter.com/date/1991/199107.html |
Date
4 July 1991, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 4 July 1991
- weekday
- Thursday, day 185 of the year, ISO week 27, summer
- sun and moon
- 12.6 days after the June solstice; moon last quarter (57% lit), 7.4 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
- 51.468306, -1.815723 — 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 | 51.468306, -1.815723 place / os_open_names |
Crop and size
- crop
- wheat (cc: wheat)
- diameter
- 213 ft (64.9 m)
- size as written
- 65 m | 213 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 | UK19910704_C |
| name | Hackpen Hill |
| location | |
| county | Wiltshire |
| country | England |
| date reported | 1991-07-04 |
| date precision | day |
| crop | wheat |
| size | 65 m | 213 ft |
| diameter (ft) | 213 |
| 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/a0fe5768c6b46… raw record view: /formation/cc/a0fe5768c6b46beb8d56067b351cc8788528dfe36a16331b48f6fd03d2af5beb 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 bc7afa8e | ≈ 2-fold score 0.963 | 4 | 1 | 0.944 | 0.1393 |
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 bc7afa8e— 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
- Litchfield 3 July 1991, Litchfield
- next
- Alton Barnes 5 July 1991, Alton Barnes
- previous in UK
- Litchfield 3 July 1991
- next in UK
- Alton Barnes 5 July 1991
- same day
- Callington (Callington) · Callington (Callington)
- within 7 days and 25 km
- Avebury July 1991, 5.2 km away · Ogbourne Maizey 11 July 1991, 6.4 km away, 7 day(s) apart · Ogbourne Maizey 11 July 1991, 6.4 km away, 7 day(s) apart · East Kennett July 1991, 7.0 km away · East Kennett July 1991, 7.0 km away · Milk Hill July 1991, 10.4 km away · Swindon July 1991, 10.6 km away · Alton Barnes 2 July 1991, 12.6 km away, 2 day(s) apart · Alton Barnes 5 July 1991, 12.6 km away, 1 day(s) apart · Alton Barnes 7 July 1991, 12.6 km away, 3 day(s) apart · Blackland 28 June 1991, 13.1 km away, 6 day(s) apart · Roundway Devizes 28 June 1991, 16.0 km away, 6 day(s) apart
In place
The nearest formations the archive can place.
Hackpen HIll12 July 1991Hackpen HIll
0 m away, 1991-07-12 Hackpen Hill9 June 1994
Hackpen Hill
0 m away, 1994-06-09 Hackpen HillAugust 1994
Hackpen Hill
0 m away, 1994-08 Hackpen Hill11 June 1997
Hackpen Hill
0 m away, 1997-06-11
Hackpen Hill18 August 1997Hackpen Hill
0 m away, 1997-08-18
Hackpen Hill17 August 1998Hackpen Hill
0 m away, 1998-08-17
- 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/UK19910704_C.json · row in index/manifest.jsonl
- input digests
- entity d761603a157f · images 709c642fcdb9 · texts 4f53cda18c2b · geo 8f145ddc065f