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File:ELVES photo by Valter Binotto 27-Mar-2023.jpg

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ELVES_photo_by_Valter_Binotto_27-Mar-2023.jpg (421 × 237 pixels, file size: 77 KB, MIME type: image/jpeg)

Summary

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Media data and Non-free use rationale
Description This ELVES was photographed by Valter Binotto on March 27,2023, at 19:43 UTC, from Possagno, Italy. It is loaded for the article Upper-atmospheric_lightning.
Author or
copyright owner
Valter Binotto
Source (WP:NFCC#4) email from author, amateur photographer Valter Binotto.
Date of publication 27-March-2023
Use in article (WP:NFCC#7) Upper-atmospheric lightning
Purpose of use in article (WP:NFCC#8) The author, amateur photographer Valter Binotto, authorized me by email to use the reduced resolution file from the original, for the Wikipedia article. The image has been recognized by experts around the world as the best taken from the ground of this natural phenomenon.
Not replaceable with
free media because
(WP:NFCC#1)
The software or website from which the screenshot is taken is copyrighted and not released under a free license, so creation of a free image is not possible.
Not replaceable with
textual coverage because
(WP:NFCC#1)
There is one artist renditions of ELVES at the beginning of the article, explaining the height, but no real photo to witness it, showing the extension of the phenomenon.
Minimal use (WP:NFCC#3) This is a reduced-resolution photo from the original, and it contains the copyright signature of the author.
Respect for
commercial opportunities
(WP:NFCC#2)
The use of a low resolution screenshot from software or a website will not impact the commercial viability of the software or site.
Other information


The distance for this type of photo must be between 100 and 600km. From what is said in the world of experts in the sector, it is the best photo ever taken of this phenomenon. The photo shows an Elve's (emission of light and very low frequency perturbations due to electromagnetic pulse sources). It is a rare species of Sprite discovered in 1990 by cameras on board the space shuttle and forms above thunderstorms with very powerful lightning.

The shot was taken on March 27 at 21.43 UTC from Possagno, TV, Italy. The lightning that triggered it was in Polverigi, AN, Italy, at 285 km as the crow flies. It was so strong that it generated an intense electromagnetic pulse. The red ring marks where the pulse hit the Earth's ionosphere. Normal lightning carries 10 to 30 kiloamperes of current; this bolt was about 10 times stronger than normal (410 kA kilo-Ampère).


The duration of the "lightning" is about one millisecond, the "donut" has a diameter measured of about 360 km and a height above the ground of about 90/100km.

The photo was taken using tools dedicated to this type of shooting: a Sony A7S high-sensitivity camera defiltered at ISO 51,200; Nikon 20mm 1.8 lens wide open; 1/25 sec. Atomos Ninja Flame external recorder at 4K.

Fair useFair use of copyrighted material in the context of Upper-atmospheric lightning//en.wikipedia.org/wiki/File:ELVES_photo_by_Valter_Binotto_27-Mar-2023.jpgtrue

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Date/TimeThumbnailDimensionsUserComment
current00:02, 7 April 2023Thumbnail for version as of 00:02, 7 April 2023421 × 237 (77 KB)DatBot (talk | contribs)Reduce size of non-free image (BOT - disable)
13:34, 6 April 2023No thumbnail2,000 × 1,125 (1.74 MB)Gciriani (talk | contribs)Uploading an excerpt from a non-free work using File Upload Wizard

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