Strange thing happening with my site. I was on the top of the google for 4-5 keywords and 2 weeks back one of the hard competition keyword came to number 1. Everything was all good ... no changes on December 2013 as well. But today when i was checking the SERP for my keywords ... my site would appear to the normal SERP position for 10 minutes and be like gone from google. The hard competition keyword is no where when i am checking with US IP. But for country specific and IPS ... it seems normal ! Any idea if this is due to the google issues 2 days back ? All of my tier 1 links are manually done with quality articles and no automated tools ! No messages on GWT !! The SERP is still fluctuation at the moment like EARTHQUAKE !!! Any idea ???