The influence of the social networks

Following the increase of visitors last month, I wanted to know why in my Google Analytics page.

Here is counting the number of unique visitors to my sites:

period	htcpcp.net	error418.org english blog	error418.fr french blog
October 2012	0	7	14
November 2012	710	271	224
December 2012	522	248	249
January 2013	867	366	394
February 2013	945	448	347
March 2013	1556	635	369
April 2013	1384	693	565
May 2013	1732	833	765
June 2013	1272	779	917
July 2013	2473	786	1345

In fact, the reason of the almost doubling of the number of visits is only a huge spike of visits on July 29 and 30.

After research, the cause of this peak is a comment posted by someone on reddit.

The effect of this quote in a comment made me really impressed about the power of social networks. What would have been the effect of a post instead of a simple comment?

Nevertheless we see that this increase is very short. Two days after the traffic is back to normal. However, I now understand better why some public personalities are so active on social networks... and the ephemeral side of the buzz effects.

Here is the visits coming from Google Analytics identified social networks.

There are a few I did not even heard about. Maybe should I open accounts for the teapot on social networks?