Hello, My author picture used to show for all search queries and for all pages of my website. But since last week, only my Google+ account name and number of circles appears below my reach results. The picture doesn't appear anymore, except for my homepage search results. Does anyone have any idea how the get my picture back? Thanks a lot,
Google has cut back on the amount of G+ rich snippets that appear in the search results, possibly by as much as 15% and there now seems to be two levels of rich snippet that appears, one with photo, one without.
Early indications are that Authors who have well established in depth articles with plenty of links and social shares on their websites get the level 1 rich snippet with photo.
Also, I recommend you look at the thread on authorship that I link to in my post on the above.
Google is increasingly looking at trust, authority, and popularity signals to confirm (or to substitute for) authorship markup. The markup by itself no long suffices to return your picture.
Focus on creating content that's higher quality, more unique, and more useful, which attracts more authoritative inbound links. If you guest post to build your reputation, try perhaps for fewer posts of higher quality... and try to work your way up to the better known blogs in your field.