Silbury Hill
UK19890715_A15 July 1989·Silbury Hill, Wiltshire
Reported 15 July 1989 at Silbury Hill, Wiltshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 15 July 1989 (day precision)
- place
- Silbury Hill
Wiltshire
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
- 51.415755, -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 34.4 KiB image/jpeg |
image ceb3a9192f19 | https://www.cropcirclecenter.com/date/1989/198907.html |
Date
15 July 1989, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 15 July 1989
- weekday
- Saturday, day 196 of the year, ISO week 28, summer
- sun and moon
- 24.1 days after the June solstice; moon waxing gibbous (88% lit), 3.2 days before 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 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 | UK19890715_A |
| name | Silbury Hill |
| location | |
| county | Wiltshire |
| country | England |
| date reported | 1989-07-15 |
| date precision | day |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1989/198907.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/adc75a34e2e79… raw record view: /formation/cc/adc75a34e2e79b22b0a548bf9c35dd2bc9776202ba9a3cff401c9dc5356f798f 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 ceb3a919 | ≈ 4-fold score 0.988 | 5 | 1 | 0.996 | 0.133 |
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 ceb3a919— 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
- Husbands Bosworth 12 July 1989, Husbands Bosworth
- next
- Mansfield 16 July 1989, Mansfield
- previous in UK
- Husbands Bosworth 12 July 1989
- next in UK
- Mansfield 16 July 1989
- same day
- no other formation is dated this day
- within 7 days and 25 km
- Bratton 19 July 1989, 24.6 km away, 4 day(s) apart
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
- Killeen Mor 9 August 1989 · Killeen Mor 9 August 1989 · Avebury Trusloe 10 May 1989 · Avebury Trusloe 10 May 1989 · Silbury Hill 10 May 1989 · Heytesbury 15 May 1989 · Beckhampton 17 May 1989 · Beckhampton 17 May 1989 · Beckhampton 28 May 1989 · Beckhampton 28 May 1989 · Whiteparish 28 May 1989 · Avebury Trusloe 29 May 1989 · Bratton 29 May 1989 · Bratton 29 May 1989 · Scratchbury Hill 2 June 1989 · Calstone Wellington 3 June 1989 · Heytesbury 4 June 1989 · Heytesbury 4 June 1989 · Heytesbury 4 June 1989 · Heytesbury 4 June 1989 and 48 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/UK19890715_A.json · row in index/manifest.jsonl
- input digests
- entity 5200c32a194d · images e338420c2739 · texts 4f53cda18c2b · geo aa1b5c724dc4