Est. KP - 3HR
Data Sources: Planetary K-index // Wing KP
Learn more about the KP index on this page: KP Index explained
The “Estimated KP – 3 HR” chart is of limited use because it only updates every 3 hours. Activity may vary during those 3 hours and a geomagnetic storm may be completely over by the time it refreshes. The KP index is shown over a 3-day period.
These plots show the latest predicted Kp index from the U. S. Air Force Weather Agency Wing Kp model. The plots are of 1-hour and 4-hour Kp predictions, along with the observed Estimated Kp. The dashed white line represents the current time. 1-hour predictions are plotted with green filled-in circles, 4-hour predictions are plotted in green plus (+) symbols, and the solid blue line is the observed Estimated Kp index. The solid horizontal green bars show the 3-hour interval over which the latest predictions are valid. Vertical error bars are plotted in green to show the 50% confidence interval.
Prediction points are plotted at the model valid time (run time + propagation time), which is usually 60 minutes into the future for the 1-hour prediction and 240 minutes into the future for the 4-hour prediction. The dashed red line indicates the lowest alert level, G1 (minor), on the NOAA Space Weather Scale for Geomagnetic Storms.