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).
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.