Silbury Hill
UK20110429_A29 April 2011·Silbury Hill, Wiltshire·oilseed rape
Reported 29 April 2011 in oilseed rape at Silbury Hill, Wiltshire. Two archives recorded it, and they give the same date.
The record
- date
- 29 April 2011 (day precision)
- place
- Silbury Hill
Wiltshire
England - crop
- oilseed rape
- size
- not recorded
- recorded by
- cc lp
- images
- 6 on the record, 4 attached · 2 diagram, 1 aerial, 3 other
- writing
- nothing was written about this formation on any source
Also called
Silbury Hill, Nr Avebury
Canonical name from the cropcirclecenter.com name; the rest are what the other source records print for the same 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
6 image(s) on this formation's own source records, and 4 more on 4 attached record(s) below. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.
Diagrams (2)
diagram
cropcirclecenter.com / Bertold Zugelder site default
diagram
cropcirclecenter.com / Bertold Zugelder site default
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | diagram | cropcirclecenter.com / Bertold Zugelder | site default | crop circle at Silbury Hill | April 29 2011 | 575×415 24.3 KiB image/jpeg |
image 281699b99622 | https://www.cropcirclecenter.com/ccdata/2011/04/29/UK20110429_A.html |
| cc | diagram | cropcirclecenter.com / Bertold Zugelder | site default | 575×415 24.3 KiB image/jpeg |
image 281699b99622 | https://www.cropcirclecenter.com/date/2011/201104.html |
Photographs (4)
aerial
Olivier Morel image credit
other
Lucy Pringle page credit
other
Lucy Pringle page credit
other
Lucy Pringle page credit
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | aerial | Olivier Morel | image credit | crop circle at Silbury Hill | April 29 2011 | 575×415 159.6 KiB image/jpeg |
image bc7f3415dbd4 | https://www.cropcirclecenter.com/ccdata/2011/04/29/UK20110429_A.html |
| lp | other | Lucy Pringle | page credit | A floral design consisting of 6 interlocking double crescents. Approx; 110 feet diameter. | 800×1112 123.1 KiB image/jpeg |
image a9451222bb3f | https://www.cropcirclephotographs.co.uk/photos/2011/silbury-hill-cropcircle-2011.shtml |
| lp | other | Lucy Pringle | page credit | A floral design consisting of 6 interlocking double crescents. Approx; 110 feet diameter. | 800×591 99.8 KiB image/jpeg |
image 0b909efa0e00 | https://www.cropcirclephotographs.co.uk/photos/2011/silbury-hill-cropcircle-2011.shtml |
| lp | other | Lucy Pringle | page credit | A floral design consisting of 6 interlocking double crescents. Approx; 110 feet diameter. | 800×602 115.8 KiB image/jpeg |
image 8e84bb5ab800 | https://www.cropcirclephotographs.co.uk/photos/2011/silbury-hill-cropcircle-2011.shtml |
Attached photographs (4)
inferred link These pictures did not come with a source record of this formation. Each one is a single-photograph archive entry whose own date and place the index matched to this formation; nothing about the formation itself comes from them. The rule, the score and the evidence are printed with each record so the link can be checked, and the credit stays with the photograph.
Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape L2
tt temporarytemples.co.uk · archive_image · 29 April 2011 ·
matched on date and place by the index (not confirmed by hand) · rule attach, tier B, score 0.90 ·
pair a0852b7f7044 · decided 2026-09-15T03:03:25Z
- attachment: tt archive_image silbury-hill-wiltshire-29th-april-2011-oilseed-rape-l2
- date 2011-04-29 vs 2011-04-29 (delta +0 d)
- name tokens shared: silbury
- county Wiltshire == Wiltshire
- country UK (uk_county) == UK (cc_id)
- crop oilseed rape == oilseed rape
- the only entity the photograph's date and place fit (UK20110429_A)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| tt | aerial | Steve Alexander / Temporary Temples | site default | Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape L2 | 800×533 556.8 KiB image/jpeg |
image 67e6ae310101 | https://temporarytemples.co.uk/crop-circles/2011-crop-circles |
Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape LOW
tt temporarytemples.co.uk · archive_image · 29 April 2011 ·
matched on date and place by the index (not confirmed by hand) · rule attach, tier B, score 0.90 ·
pair acfe1c397aaf · decided 2026-09-15T03:03:25Z
- attachment: tt archive_image silbury-hill-wiltshire-29th-april-2011-oilseed-rape-low
- date 2011-04-29 vs 2011-04-29 (delta +0 d)
- name tokens shared: silbury
- county Wiltshire == Wiltshire
- country UK (uk_county) == UK (cc_id)
- crop oilseed rape == oilseed rape
- the only entity the photograph's date and place fit (UK20110429_A)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| tt | aerial | Steve Alexander / Temporary Temples | site default | Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape LOW | 800×553 650.2 KiB image/jpeg |
image 6522020ea4ef | https://temporarytemples.co.uk/crop-circles/2011-crop-circles |
Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape L
tt temporarytemples.co.uk · archive_image · 29 April 2011 ·
matched on date and place by the index (not confirmed by hand) · rule attach, tier B, score 0.90 ·
pair 538cd3455652 · decided 2026-09-15T03:03:25Z
- attachment: tt archive_image silbury-hill-wiltshire-29th-april-2011-oilseed-rape-l
- date 2011-04-29 vs 2011-04-29 (delta +0 d)
- name tokens shared: silbury
- county Wiltshire == Wiltshire
- country UK (uk_county) == UK (cc_id)
- crop oilseed rape == oilseed rape
- the only entity the photograph's date and place fit (UK20110429_A)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| tt | aerial | Steve Alexander / Temporary Temples | site default | Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape L | 533×800 528.5 KiB image/jpeg |
image 3849015a10e2 | https://temporarytemples.co.uk/crop-circles/2011-crop-circles |
Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape LOW2
tt temporarytemples.co.uk · archive_image · 29 April 2011 ·
matched on date and place by the index (not confirmed by hand) · rule attach, tier B, score 0.90 ·
pair 8b48373f88d0 · decided 2026-09-15T03:03:25Z
- attachment: tt archive_image silbury-hill-wiltshire-29th-april-2011-oilseed-rape-low2
- date 2011-04-29 vs 2011-04-29 (delta +0 d)
- name tokens shared: silbury
- county Wiltshire == Wiltshire
- country UK (uk_county) == UK (cc_id)
- crop oilseed rape == oilseed rape
- the only entity the photograph's date and place fit (UK20110429_A)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| tt | aerial | Steve Alexander / Temporary Temples | site default | Silbury Hill, Wiltshire | 29th April 2011 | Oilseed Rape LOW2 | 800×575 630.4 KiB image/jpeg |
image 13e23ae61dc2 | https://temporarytemples.co.uk/crop-circles/2011-crop-circles |
Date
29 April 2011, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 29 April 2011 lp: 29 April 2011
- weekday
- Friday, day 119 of the year, ISO week 17, spring
- sun and moon
- 39.5 days after the March equinox; moon waning crescent (13% lit), 11.4 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
- 51.415755, -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 | |||
| lp | Silbury Hill, Nr Avebury | Wiltshire | none |
Crop and size
- crop
- oilseed rape (cc: oilseed rape, lp: —)
- diameter
- not recorded by any source
- size as written
- not recorded
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 | lp cropcirclephotographs.co.uk |
|---|---|---|
| id / slug differs | UK20110429_A | silbury-hill-2011 |
| name | Silbury Hill | Silbury Hill |
| location | Silbury Hill, Nr Avebury | |
| county | Wiltshire | Wiltshire |
| country | England | |
| date reported | 2011-04-29 | 2011-04-29 |
| date precision | day | day |
| crop | oilseed rape | |
| size | ||
| diameter (ft) | ||
| grid reference | ||
| what3words | ||
| map link | ||
| credits differs | Olivier Morel, cropcirclecenter.com / Bertold Zugelder | Lucy Pringle |
| source page differs | https://www.cropcirclecenter.com/date/2011/201104.html | https://www.cropcirclephotographs.co.uk/photos/2011/silbury-hill-cropcircle-2011.shtml |
| link to the entity | rule Bscore 0.90 decided by rule on 2026-09-15 date 2011-04-29 vs 2011-04-29 (delta +0 d); name tokens shared: silbury; county Wiltshire == Wiltshire; country UK (cc_id) == UK (uk_county) |
rule Bscore 0.90 decided by rule on 2026-09-15 date 2011-04-29 vs 2011-04-29 (delta +0 d); name tokens shared: silbury; county Wiltshire == Wiltshire; country UK (cc_id) == UK (uk_county) |
| warnings | none | none |
| record | cc/e072190086d55… raw record view: /formation/cc/e072190086d55df0e9806bcab67d5376077b23d1be6515ab609090761299a78d in the preview app |
lp/a94cf57aeefe0… raw record view: /formation/lp/a94cf57aeefe0f8560d2d003da19830a1d4f3263415971d9022129c57b7d81ad 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
2 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 281699b9 | ≈ none found | 3 | 1 | 0.691 | 0.3365 |
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 281699b9— 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
- Hoeven 28 April 2011, Hoeven
- next
- Cikarang 4 May 2011, Cikarang
- previous in UK
- Alton Barnes 27 April 2011
- next in UK
- Hannington 7 May 2011
- same day
- no other formation is dated this day
- within 7 days and 25 km
- Alton Barnes 27 April 2011, 6.5 km away, 2 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
- Etchilhampton 16 September 2011 · Bishops Cannings October 2011 · Alton Barnes 27 April 2011 · Hannington 7 May 2011 · Hannington 7 May 2011 · East Kennett 17 May 2011 · Burderop Down 21 May 2011 · Avebury 28 May 2011 · Avebury 29 May 2011 · Hackpen Hill 30 May 2011 · Wilton Windmill 1 June 2011 · Stonehenge 20 June 2011 · Stonehenge 20 June 2011 · Stanton St Bernard 21 June 2011 · Westwoods 21 June 2011 · Alton Barnes 22 June 2011 · East Kennett 23 June 2011 · Honeystreet 26 June 2011 · Fonthill Down 27 June 2011 · Allington 28 June 2011 and 41 more
Provenance
- entity built at
- 2026-09-15T21:14:17Z (derived from the link decisions, not from this build)
- index run ids
- 20260915T030325Z-index-build, 20260915T211417Z-index-build
- reviews applied
- none
- open queue pairs
- none
- entity record
- index/formations/UK20110429_A.json · row in index/manifest.jsonl
- input digests
- entity 862af1f92412 · images 5e9cdc06d379 · attachments 4b7ca7591cf9 · texts 4f53cda18c2b · geo 8df3f3048c6b