select the target site, check the site in the major search engines is normal, using "site: target URL" see included, if only one or a few included in 10 pages, it is possible to search engine drop right suspect.
, by searching for keywords
site outside the chain and chain number
in the "site: target site to see whether the latest snapshot, or within 3 days. If the snapshot difference for a week or more, is likely to remain the snapshot. It can be seen from the figure third page website snapshot is relatively healthy.