This chart of the real-time K-index is pretty interesting: https://www.swpc.noaa.gov/products/planetary-k-index#:~:text=The%20K%2Dindex%20quantifies%20disturban

This chart of the real-time K-index is pretty interesting: https://www.swpc.noaa.gov/products/planetary-k-index#:~:text=The%20K%2Dindex%20quantifies%20disturbances,during%20a%20three%2Dhour%20interval https://www.swpc.noaa.gov/products/planetary-k-index#:~:text.... I found this after looking up what "A GMD warning of K7 or greater" means.