Planetary Kp index
0–9 (≥5 = geomagnetic storm)
Daily Kp max
Storm threshold (5)
Space weather · Live via NOAA SWPC
The planetary Kp index measures disturbances in Earth's magnetic field caused by solar activity. Kp 5+ means a geomagnetic storm is underway.
Solar wind from DSCOVR/SOLAR-1 spacecraft via NOAA SWPC. Speed >500 km/s or density spikes can indicate active geomagnetic conditions.