File:Sunspot butterfly diagram.svg

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Summary

Description
English: Variation of the position and the area of sunspots.
Deutsch: Änderung der Lage und Größe der Sonnenflecken.
Date
Source Royal Observatory, Greenwich, data prepared on: http://solarscience.msfc.nasa.gov/greenwch
Author Con-struct
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Generated with Wikimedia SVG Chart

Data format The source data of the chart is in the SVG image file in a clearly readable format. You see the original numbers inside of the SVG file in the form of a list such as this: 
...
1995 10.06
1996 11.75
1997 12.45
...
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Use of the source data

Basis is the corrected real area of a whole sunspot. E.g. this on the 1960-01-01 a value of 350 millionths of the visible Sun's hemisphere.

The position is also corrected for a better illustration. The displayed 50% latitude is not 45 but 30. The equation is 

0.00456273 * (2191.67 - (90 - Abs(lat))^1.7095) * IIf(lat < 0, -1, 1)

Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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attribution share alike
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inception

12 September 2013

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image/svg+xml

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Date/TimeThumbnailDimensionsUserComment
current00:12, 15 March 2022Thumbnail for version as of 00:12, 15 March 20221,613 × 510 (489 KB)ManlleusFile uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for ca.
20:46, 13 September 2013Thumbnail for version as of 20:46, 13 September 20131,613 × 510 (523 KB)Con-struct2013-09-04

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