Google Core Update

Technical blueprint dashboard showing multiple SEO ranking volatility tracker line charts spiking on April 23, 2026, with Semrush, Mozcast, and Sistrix labels visible on the grid.

Google's SERP Trackers Spiked Again 15 Days After the March Core Update Closed

Google's March 2026 core update ended on April 8. Fifteen days later, on April 23, Semrush, Mozcast, Sistrix, and the Wireboard aggregator all lit up again, with several tools recalibrating their default scales to handle the new range. Google's own guidance says to wait a full

Blueprint visualization of newspaper mastheads on a podium with rising bar charts showing Google search visibility gains for major publishers

Google's March Core Update Handed the NYT and Guardian Another Win

Google finished rolling out its March 2026 core update on April 8. Twelve days, four hours, and the results look almost identical to the last three core updates. The New York Times gained the most visibility in the US. The Guardian gained the most in the UK. And smaller publishers