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The problem is that you are implementing a canonical from all those parametrized pages to http://mathematica-mpr.com/news/, and the content in that page -an empty result list- is not the same as in the original link you provide in your post -which show article results. Canonical is used to show a preferred URL for a page, when there are two or more URLs which lead to the same content. After implementing the canonical, you have to make sure you are not linking to the "bad" url or it will never disappear from Google's SERP. As your content is not the same on both pages, and the old URL is still accessible from your site, you are not fullfill the requirements to make those URL disappear. I think that if you don't want those index to appear on the SERPs as depending on the search options it will lead to very common pages, and it is almost impossible to identify clearly a canonical reference for them, the best option is to add to robots.txt a line which blocks those parameters, and you will end with that problems. Disallow: /news/?facet=* This will remove your search results from the index, ending with duplication problems. Please make sure this is what you want, or if you prefer to keep those results although you continue having duplication issues.

Even if the image is decorative, it is still describing the contents of the image to visually impaired users. Here's more from Google: https://support.google.com/webmasters/answer/114016?hl=en From Google: "The alt attribute is used to describe the contents of an image file. It's important for several reasons: It provides Google with useful information about the subject matter of the image. We use this information to help determine the best image to return for a user's query. Many people-for example, users with visual impairments, or people using screen readers or who have low-bandwidth connections—may not be able to see images on web pages. Descriptive alt text provides these users with important information." The image's decorative value is for the user to judge, it's about providing the full story and experience to all users not some.

Hi Rose, Jeff provided a great response. Did it answer your question? If so, please mark it "good answer", thanks! Christy