My website was going on perfectly, and suddenly, boom... falls down badly... I didn't used any blackhat methods... hope someone knows what happened. 3x my website hosting was down due bandwith loss ( 3 days i think) , is it maybe a reason?
It all depends whats your website, if its something related to facebook using some app to drive mass amount of traffic with some viral content, it probably caused that fb pached that app or it lost it rights for posting, if it's pure seo, check ur ranking, before and after, do some research.
Sandboxed means your website doesn't show up in Google anymore. Do some search engine analysis, see where people were coming from when you were getting those clicks and where they're coming from now.
You webmaster data doesn't show any downfall. but there is a downfall in analytics, but that is 0. I think there is some problem with your analytics code. Check your coder properly, if the data is being tracked. and the data which you're showing is just for one month. Can you also show us the source of traffic for this particular time period. I think it would have been coming from a single source
This picture doesn't give any Idea, you'll have to post the comparison here for us to understand the real situation. Did you check the analytics code if it is working fine
First Step to get the comparison data: Set date in first field: May 1, 2013 - Aug 29, 2012 the click compare and apply
Can I give you acces so you can check it? I can't get it to work :S send me your mail to PM if you like