SEPC alerts of geomagnetic phenomena are based primarily on near-real-time estimated 3-hour Planetary Kp-index data from SWPC derived at the U.S. Air Force Space Forecast Center. When Kp index is greater than 5 the geomagnetic storm alerts will be issued for each occurrence within any 3-hr period. The different color indicates the geomagnetic storm intensity.
Red color indicates Kp≤5
Yellow color indicates Kp=5,6
Orange color indicates Kp=7,8
Red color indicates Kp=9