File:Sunspot-bfly.gif

Size of this preview: 800 × 476 pixels. Other resolutions: 320 × 191 pixels | 640 × 381 pixels | 1,024 × 610 pixels | 1,280 × 762 pixels | 2,150 × 1,280 pixels.

Original file (2,150 × 1,280 pixels, file size: 142 KB, MIME type: image/gif)

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

Summary

Description

English: Daily sunspot area averaged over individual solar rotations. This is colloquially known as the "Butterfly Diagram".

Detailed observations of sunspots have been obtained by the Royal Greenwich Observatory since 1874. These observations include information on the sizes and positions of sunspots as well as their numbers. These data show that sunspots do not appear at random over the surface of the sun but are concentrated in two latitude bands on either side of the equator. A butterfly diagram (updated monthly) showing the positions of the spots for each rotation of the sun since May 1874 shows that these bands first form at mid-latitudes, widen, and then move toward the equator as each cycle progresses.

— NASA, http://solarscience.msfc.nasa.gov/SunspotCycle.shtml

Date

2013, NASA version 2013/11 shown here.

Source

http://solarscience.msfc.nasa.gov/images/bfly.gif

Author

David Hathaway, NASA, Marshall Space Flight Center

Permission
(Reusing this file)

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

Original upload log

The original description page was here. All following user names refer to en.wikipedia.

Date/Time	Dimensions	User	Comment
2013-11-07 19:24	1950×500× (88047 bytes)	Grolltech	updated to version 2013/11.
2012-03-09 05:08	1950×500× (87477 bytes)	Speight	crop to match earlier versions
2012-03-09 05:02	2048×1280× (137615 bytes)	Speight	updated version 2012-03
2011-04-22 04:16	1950×500× (90310 bytes)	孟柏民	another update
2009-09-08 04:52	2048×506× (90295 bytes)	孟柏民	updated version
2007-05-31 13:32	1872×500× (77217 bytes)	Paulchar	Author: David Hathaway, NASA Marshall Space Flight Center (http://solarscience.msfc.nasa.gov). Public-domain image.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	10:24, 20 December 2020	2,150 × 1,280 (142 KB)	Q28	update
	20:09, 14 January 2017	1,950 × 500 (86 KB)	OgreBot	(BOT): Reverting to most recent version before archival
	20:08, 14 January 2017	1,950 × 500 (85 KB)	OgreBot	(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2012-03-09 05:08:58 by Speight
	20:08, 14 January 2017	2,048 × 1,280 (134 KB)	OgreBot	(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2012-03-09 05:02:52 by Speight
	20:08, 14 January 2017	1,950 × 500 (88 KB)	OgreBot	(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2011-04-22 04:16:59 by 孟柏民
	20:08, 14 January 2017	2,048 × 506 (88 KB)	OgreBot	(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2009-09-08 04:52:46 by 孟柏民
	20:08, 14 January 2017	1,872 × 500 (75 KB)	OgreBot	(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2007-05-31 13:32:13 by Paulchar
	16:18, 14 January 2017	1,950 × 500 (86 KB)	Taiwania Justo	Transferred from en.wikipedia