Silbury Hill
UK19980504_A4 May 1998·Silbury Hill, Wiltshire·oilseed rape
Possibly the same formation as: these cross-site pairs are still open in the index review queue.
-
Beckhampton (Beckhampton, nr Silbury Hill)(lp, tier C, score 0.75, rule adjacent_day, pair 7494621a)
date 1998-05-04 vs 1998-05-05 (delta -1 d); place tokens shared: silbury; county Wiltshire == Wiltshire; country UK (cc_id) == UK (country_field) -
Bishops Canning (Bishops Canning, nr Beckhampton)(lp, tier C, score 0.60, rule county_only, pair 2934b607)
date 1998-05-04 vs 1998-05-04 (delta +0 d); county Wiltshire == Wiltshire; country UK (cc_id) == UK (country_field) -
West Kennet Longbarrow (West Kennet Longbarrow)(lp, tier C, score 0.60, rule county_only, pair 7b3cc968)
date 1998-05-04 vs 1998-05-04 (delta +0 d); county Wiltshire == Wiltshire; country UK (cc_id) == UK (country_field)
Reported 4 May 1998 in oilseed rape at Silbury Hill, Wiltshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 4 May 1998 (day precision)
- place
- Silbury Hill
Wiltshire
England - crop
- oilseed rape
- size
- 236 ft (71.9 m) across
as written: 72 m | 236 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 64.5 KiB image/jpeg |
image 2f0a975f0d84 | https://www.cropcirclecenter.com/date/1998/199805.html |
Date
4 May 1998, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 4 May 1998
- weekday
- Monday, day 124 of the year, ISO week 19, spring
- sun and moon
- 44.7 days after the March equinox; moon waxing gibbous (61% lit), 7.1 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
- oilseed rape (cc: oilseed rape)
- diameter
- 236 ft (71.9 m)
- size as written
- 72 m | 236 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 | UK19980504_A |
| name | Silbury Hill |
| location | |
| county | Wiltshire |
| country | England |
| date reported | 1998-05-04 |
| date precision | day |
| crop | oilseed rape |
| size | 72 m | 236 ft |
| diameter (ft) | 236 |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1998/199805.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/75359db18103b… raw record view: /formation/cc/75359db18103b4064c48b6250d0557f096cd980be2cb1d5791055d982de93251 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 2f0a975f | ≈ 11-fold score 0.897 | 1 | 2 | 0.908 | 0.2612 |
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 2f0a975f— 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
- UK19980503_B 3 May 1998
- next
- Beckhampton 5 May 1998, Beckhampton
- previous in UK
- UK19980503_B 3 May 1998
- next in UK
- Beckhampton 5 May 1998
- same day
- Bishops Canning (Bishops Canning) · West Kennet Longbarrow (West Kennet Longbarrow)
- within 7 days and 25 km
- Chiseldon 10 May 1998, 14.1 km away, 6 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
- Chiseldon 20 April 1998 · Chiseldon 10 May 1998 · Ogbourne Maizey 17 May 1998 · Chiseldon 19 May 1998 · West Overton 23 May 1998 · Winterbourne Bassett 23 May 1998 · Lockeridge 25 May 1998 · West Overton 25 May 1998 · West Overton 28 May 1998 · West Overton 29 May 1998 · Trowbridge 30 May 1998 · Trowbridge 30 May 1998 · West Kennett 1 June 1998 · Bishops Cannings 5 June 1998 · Avebury Stone Avenue 6 June 1998 · Beckhampton 6 June 1998 · West Overton 13 June 1998 · West Kennett 14 June 1998 · East Kennett 15 June 1998 · West Overton 16 June 1998 and 72 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
- 2934b607e7cd20272815e6de44ffeaeb8074ef73df35209d3e3c7bbe17c54314, 7494621ad6da154da7c9a22492144a54f8eb3b6592dbd57e631f6d4876d6ec55, 7b3cc9683cdb5079b7350027cb628dc5f667e3721170beb3fb42a8b270de0415
- entity record
- index/formations/UK19980504_A.json · row in index/manifest.jsonl
- input digests
- entity c4b9b086c799 · images 27cd2919b285 · texts 4f53cda18c2b · geo 6fc70d4cdc91