Porsgrunn
NO20130718_A18 July 2013·Porsgrunn·grass
Reported 18 July 2013 in grass at Porsgrunn. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 18 July 2013 (day precision)
- place
- Porsgrunn
Norway - crop
- grass
- size
- not recorded
- recorded by
- cc
- images
- 3 · 2 diagram, 1 aerial
- 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
- 59.140540, 9.656100
- 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
3 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 (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 Porsgrunn | July 18 2013 | 575×415 46.8 KiB image/jpeg |
image ff54e6d7eb46 | https://www.cropcirclecenter.com/ccdata/2013/07/18/NO20130718_A.html |
| cc | diagram | cropcirclecenter.com / Bertold Zugelder | site default | 575×415 46.8 KiB image/jpeg |
image ff54e6d7eb46 | https://www.cropcirclecenter.com/date/2013/201307.html |
Photographs (1)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | aerial | Terje Wulfsberg | image credit | crop circle at Porsgrunn | July 18 2013 | 575×415 76.3 KiB image/jpeg |
image 6aa7976ee7f6 | https://www.cropcirclecenter.com/ccdata/2013/07/18/NO20130718_A.html |
Date
18 July 2013, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 18 July 2013
- weekday
- Thursday, day 199 of the year, ISO week 29, summer
- sun and moon
- 27.3 days after the June solstice; moon waxing gibbous (75% lit), 4.3 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
- 59.140540, 9.656100 — place, ±2,000 m, by geonames, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Telemark | Norway | 59.140540, 9.656100 place / geonames |
Crop and size
- crop
- grass (cc: grass)
- 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 |
|---|---|
| id / slug | NO20130718_A |
| name | Porsgrunn |
| location | |
| county | Telemark |
| country | Norway |
| date reported | 2013-07-18 |
| date precision | day |
| crop | grass |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | Terje Wulfsberg, cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/2013/201307.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | none |
| record | cc/b67f585ff35b2… raw record view: /formation/cc/b67f585ff35b22dcc54c99c0b9b2fe25bb6aa0e88834ba8d39c6906ea80eb502 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 ff54e6d7 | ≈ 6-fold score 0.985 | 1 | 2 | 0.992 | 0.4974 |
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 ff54e6d7— 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
- Hilcott 16 July 2013, Hilcott
- next
- Momalle 21 July 2013, Momalle
- previous in NO
- Tuftevegen 13 July 2012
- next in NO
- Klepp 15 September 2013
- same day
- Rohozná (Rohozná)
- 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.
Skien27 June 2007Skien
8.1 km away, 2007-06-27
Larvik9 July 1997Larvik
23.7 km away, 1997-07-09 Åsgårdstrand9 June 1991
Åsgårdstrand
51.8 km away, 1991-06-09
TvedestrandAugust 1999Tvedestrand
71.1 km away, 1999-08
OnsøySeptember 2011Onsøy
72.6 km away, 2011-09
Vestby9 August 2015Vestby
81.4 km away, 2015-08-09
- 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/NO20130718_A.json · row in index/manifest.jsonl
- input digests
- entity b10e5ba63b46 · images ce3ba39a4d82 · texts 4f53cda18c2b · geo dffc4c0b4daf