Hjortkvarn
SE19710403_A3 April 1971·Hjortkvarn·grass
Reported 3 April 1971 in grass at Hjortkvarn. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 3 April 1971 (day precision)
- place
- Hjortkvarn
Sweden - crop
- grass
- size
- 46 ft (14.0 m) across
as written: 14 m | 46 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
- 58.900000, 15.433330
- how it was got
- geonames
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 43.2 KiB image/jpeg |
image a33c8e32a8eb | https://www.cropcirclecenter.com/date/1971/197104.html |
Date
3 April 1971, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 3 April 1971
- weekday
- Saturday, day 93 of the year, ISO week 13, spring
- sun and moon
- 13.2 days after the March equinox; moon first quarter (59% lit), 7.3 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
- 58.900000, 15.433330 — place, ±2,000 m, by geonames, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Örebro län | Sweden | 58.900000, 15.433330 place / geonames |
Crop and size
- crop
- grass (cc: grass)
- diameter
- 46 ft (14.0 m)
- size as written
- 14 m | 46 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 | SE19710403_A |
| name | Hjortkvarn |
| location | |
| county | Örebro län |
| country | Sweden |
| date reported | 1971-04-03 |
| date precision | day |
| crop | grass |
| size | 14 m | 46 ft |
| diameter (ft) | 46 |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1971/197104.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/a3d109573c33c… raw record view: /formation/cc/a3d109573c33cd015091c3cb250c3c051d54c0b793e189c25b9d58b4873259ce 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 a33c8e32 | ≈ continuous (concentric circles) | 2 | 2 | 0.998 | 0.5008 |
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 a33c8e32— 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
- Taupo April 1971, Taupo
- next
- Chrsitmas Creek 20 April 1971, Chrsitmas Creek
- previous in SE
- Upland 16 November 1958
- next in SE
- Hjortkvarn 1972
- same day
- no other formation is dated this day
- within 7 days and 25 km
- none, or this formation has no coordinate at place confidence or better
In place
The nearest formations the archive can place.
Hjortkvarn
0 m away, 1972
Skyllberg30 July 1993Skyllberg
26.4 km away, 1993-07-30
Skyllberg30 July 1993Skyllberg
26.4 km away, 1993-07-30
Tystberga30 July 2005Tystberga
103.6 km away, 2005-07-30
Tystberga30 July 2005Tystberga
103.6 km away, 2005-07-30
Tystberga30 July 2005Tystberga
103.6 km away, 2005-07-30
- same county and year
- none
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/SE19710403_A.json · row in index/manifest.jsonl
- input digests
- entity d848f37b417c · images 5333f18618ef · texts 4f53cda18c2b · geo 0720f3cec530