pnc123 - 2:42 pm on Sep 4, 2013 (gmt 0)
Same thing here - all happened overnight.
Today Google traffic down 50-70%
Ours was an EMD which was hit late last yesr - 3 months ago we bit the bullet and 301'd the whole lot to a new domain name.
Was almost back to its former rankings until about 2-3am GMT today.
Now I can only see a few pages in the SERPS
We are an informational education .com site hosted in the UK.