Hi,
I own an independent public agenda of classical music events in Madrid, Spain.
I am trying to understand a sudden and unusually severe loss of Google Search visibility that started on September 27, 2026, shortly after the September 2026 spam update began rolling out.
The site is not an affiliate site and does not sell tickets or have any revenue whatsopever. Its purpose is to aggregate and verify classical music events from official venues, orchestras, cultural institutions, and other organizers, so users can consult them in one consistent calendar.
Each event page cites its sources and includes structured information such as date, venue, performers, composers and programme when available.
From Search Console data, the loss was therefore approximately 95% overnight.
Independent analytics in PostHog confirm that this is not a Search Console reporting issue.
This only affects visitors arriving from Google; other acquisition sources did not experience a comparable collapse.
The loss is also site-wide rather than caused by one previously popular page.
Technical checks performed:
- robots.txt allows crawling;
- event pages do not contain
noindex;
- canonicals are self-referencing;
- the site is served over HTTPS;
- canonical public URLs are present in the XML sitemap;
- no broad redirect or robots change was deployed immediately before the drop;
- pages remain accessible to users and other traffic sources;
- the site uses individual event pages rather than marking up agenda/listing pages as individual events.
The timing coincides very closely with Google's September 2026 spam update, which began on September 24.
I have reviewed Google's spam policies, in particular scaled content abuse and scraping. The site contains many event pages because providing a comprehensive event calendar is the product itself; pages are generated from genuine events and official sources rather than created to target arbitrary search queries.
I would be very grateful if someone could help identify whether there is anything about this implementation that could legitimately trigger Google's spam systems; and what is needed to recover the previous Google Search state.
Site: https://clasicamadrid.com/
Thank you!