I'm not sure if it's directly relevant to EarthArxiv users, as there's no report so far from the users, but with all preprint services connected to the same OSF server, the same problem could occur to EarthArxiv.
So at INArxiv, the GS indexing went smooth from August to November 2017. But in December 2017, there are some reports from many authors (10 authors) who submitted their work through US found
their works to no longer be indexed, or gone missing from the Google
Scholar system, or their profile page. For this problem, I've sent an email to OSF support (replied by Nici) saying that the problem was on GS' side. Then one of our team sent an email to Alex Verstak, and here's his response. Any thoughts?
I assume you're referring to URLs like these:
They don't meet our technical inclusion guidelines:
1. No metatags:
2. Not discoverable by crawlers:
- sitemap doesn't include them: https://osf.io/sitemaps/sitemap_index.xml
- view-source shows no content and no links to PDF; it's all rendered by JS which crawlers don't support.
I recommend to ask the developers of osf.io to implement our inclusion guidelines. I can't tell if they used to have these things but changed them, or if they never did. As far as I can see, their current website isn't compatible with Google Scholar; it isn't technically possible for us to index it comprehensively.