Summary

Description Carbon14 with activity labels.svg	English: Changes in the 14 C record, which are primarily (but not exclusively) caused by changes in solar activity . Note that "before present" is used in the context of radiocarbon dating , where the "present" has been fixed at 1950. Italiano: Variazioni del Carbonio-14 negli ultimi 1200 anni
Date	28 February 2007 (original upload date)
Source	All data are from publicly available sources. ( red trace ) Carbon 14 record : http://www.radiocarbon.org/IntCal04%20files/intcal04.14c
Author	This figure was produced by Leland McInnes using gnuplot and is licensed under the GFDL . Original uploader was Leland McInnes at en.wikipedia . Later version(s) were uploaded by Dragons flight at en.wikipedia .
Permission ( Reusing this file )	Released under the GNU Free Documentation License
Other versions	Derivative works of this file: Carbon14 with activity labels fi.svg Carbon14 with activity labels-fr.svg Carbon14 with activity labels-it.svg
SVG development InfoField	The SVG code is valid . This diagram was created with Inkscape , or with something else .

Licensing

Leland McInnes at the English-language Wikipedia , the copyright holder of this work, hereby publishes it under the following license:

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	Attribution: Leland McInnes at the English-language Wikipedia
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	This licensing tag was added to this file as part of the GFDL licensing update . http://creativecommons.org/licenses/by-sa/3.0/ CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 true true

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 . Subject to disclaimers . http://www.gnu.org/copyleft/fdl.html GFDL GNU Free Documentation License true true

Original upload log

• 2007-02-28 17:16 Dragons flight 885×325× (11064 bytes) various cleanup. Years Before Present means relative to 1950, let's be clear.
• 2006-11-21 23:12 Leland McInnes 1052×429× (26990 bytes) Solar actvity events as they appear in the ¹⁴C record.