Editing Sunspot (section)

==External links==
{{Commons category|Sunspots}}
* [https://web.archive.org/web/20150521142828/http://fenyi.solarobs.unideb.hu/ Sunspot Database based on Terrestrial (GPR/DPD) and Satellite (SOHO/SDO) observations from 1872 to Nowadays with the newest data.] ([[File:Flag of Hungary.svg|20px|link=|Solar Observatory - Debrecen, Hungary]])
* [https://web.archive.org/web/20100820163335/http://solarcycle24.com/ Solar Cycle 24 and VHF Aurora Website (www.solarcycle24.com)]
* [http://sidc.oma.be/index.php3 Belgium World Data Center for the sunspot index] {{Webarchive|url=https://web.archive.org/web/20170803104838/http://sidc.oma.be/index.php3 |date=3 August 2017 }}
* [https://web.archive.org/web/20051212113926/http://www.universetoday.com/am/publish/sharpest_image_sunspot.html?6102005 High resolution sunspot image]
* [https://web.archive.org/web/20100116124450/http://www.perseus.gr/Astro-Solar-Sunspots.htm Sunspot images in high-res] Impressive collection of sunspot images
* [https://archive.today/20120604110852/http://www.swpc.noaa.gov/SolarCycle/ NOAA Solar Cycle Progression]: Current solar cycle.
** Current conditions: [[Space weather]]
* [http://www.lmsal.com Lockheed Martin Solar and Astrophysics Lab]
* [https://web.archive.org/web/20181001081332/http://www.suntrek.org/ Sun|trek website] An educational resource for teachers and students about the Sun and its effect on the Earth
* Tools to display the current sunspot number in a browser
** [http://www.n0hr.com/Propfire.htm Propfire – displays current sunspot number in browser status bar]
** [http://www.n0hr.com/Ham_Radio_Toolbar.htm HamLinks Toolbar – displays solar flux, A Index and K Index data in a toolbar]
* [http://antwrp.gsfc.nasa.gov/apod/image/0211/sunspot_swedish_c1.jpg The Sharpest View of the Sun ]
* [http://www.spaceweather.com/ Daily Sunspot Update and Picture of the Sun (www.spaceweather.com)]
* [http://alienworlds.southwales.ac.uk/sunStructure.html#/photosphere Animated explanation of Sunspots in the Photosphere] {{Webarchive|url=https://web.archive.org/web/20151116133527/http://alienworlds.southwales.ac.uk/sunStructure.html#/photosphere |date=16 November 2015 }} (University of South Wales)

===Sunspot data===
* {{cite web | title=11,000 Year Sunspot Number Reconstruction | work=Global Change Master Directory | url=http://gcmd.nasa.gov/KeywordSearch/Metadata.do?Portal=GCMD&KeywordPath=%5BParameters%3ACategory%3D%27EARTH+SCIENCE%27%2CTopic%3D%27SUN-EARTH+INTERACTIONS%27%2CTerm%3D%27SOLAR+ACTIVITY%27%2CVariable%3D%27SUNSPOTS%27%5D&OrigMetadataNode=GCMD&EntryId=NOAA_NCDC_PALEO_2005-015&MetadataView=Brief&MetadataType=0&lbnode=gcmd3b | access-date=11 March 2005 | archive-date=2 November 2015 | archive-url=https://web.archive.org/web/20151102112535/http://gcmd.nasa.gov/KeywordSearch/Metadata.do?Portal=GCMD&KeywordPath=%5BParameters%3ACategory%3D%27EARTH+SCIENCE%27%2CTopic%3D%27SUN-EARTH+INTERACTIONS%27%2CTerm%3D%27SOLAR+ACTIVITY%27%2CVariable%3D%27SUNSPOTS%27%5D&OrigMetadataNode=GCMD&EntryId=NOAA_NCDC_PALEO_2005-015&MetadataView=Brief&MetadataType=0&lbnode=gcmd3b | url-status=dead }}
** {{cite web | title= Unusual activity of the Sun during recent decades compared with the previous 11,000 years | work=WDC for Paleoclimatology | url=http://www.ncdc.noaa.gov/paleo/pubs/solanki2004/ | access-date=11 March 2005}}
* {{cite web | title=Sunspot Numbers from Ancient Times to Present from NOAA/NGDC | work=Global Change Master Directory | url=http://gcmd.nasa.gov/KeywordSearch/Metadata.do?Portal=GCMD&KeywordPath=%5BParameters%3ACategory%3D%27EARTH+SCIENCE%27%2CTopic%3D%27SUN-EARTH+INTERACTIONS%27%2CTerm%3D%27SOLAR+ACTIVITY%27%2CVariable%3D%27SUNSPOTS%27%5D&OrigMetadataNode=GCMD&EntryId=FE00140&MetadataView=Brief&MetadataType=0&lbnode=gcmd3b | access-date=11 March 2005 | archive-date=14 September 2015 | archive-url=https://web.archive.org/web/20150914054517/http://gcmd.nasa.gov/KeywordSearch/Metadata.do?Portal=GCMD&KeywordPath=%5BParameters%3ACategory%3D%27EARTH+SCIENCE%27%2CTopic%3D%27SUN-EARTH+INTERACTIONS%27%2CTerm%3D%27SOLAR+ACTIVITY%27%2CVariable%3D%27SUNSPOTS%27%5D&OrigMetadataNode=GCMD&EntryId=FE00140&MetadataView=Brief&MetadataType=0&lbnode=gcmd3b | url-status=dead }}
** {{cite web | title=Sunspot Numbers | work=NOAA NGDC Solar Data Services | url=ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_NUMBERS/ | access-date=21 June 2010 }}{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }}
*** International Sunspot Number{{snd}}sunspot maximum and minimum 1610–present; annual numbers 1700–present; monthly numbers 1749–present; daily values 1818–present; and sunspot numbers by north and south hemisphere. The McNish–Lincoln sunspot prediction is also included.
*** American sunspot numbers 1945–present
*** Ancient sunspot data 165 BC to 1684 AD
*** Group Sunspot Numbers (Doug Hoyt re-evaluation) 1610–1995
* {{cite book | last1=Wilson|first1=Robert M.|title=Comparison of the Variations of Sunspot Number, Number of Sunspot Groups, and Sunspot Area, 1875–2013|publisher=National Aeronautics and Space Administration, Marshall Space Flight Center|location=Huntsville, AL| date=April 2014| url=https://purl.fdlp.gov/GPO/gpo54398|access-date=13 March 2015}}

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