The original SCP logo was designed by far2, based on a free asset from Adobe Illustrator's "Mad Science" asset library, which in turn was based on the electrostatic discharge warning symbol. The first high-resolution PNG version of the logo was made by Aelanna, based on the original SCP logo.
At the author's website is the following stated: "Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License". Reviewed on Sep. the 20th, 2013 at 16:56 (GMT+1).