Geomagnetic Activity
The Kp index is a global measure of geomagnetic disturbance, ranging from 0 (quiet) to 9 (extreme storm). It is derived from ground-based magnetometer stations and updated every three hours. Higher Kp values indicate stronger geomagnetic storms, which can affect power grids, satellite operations, GPS accuracy, and produce visible aurora at lower latitudes.
Kp Index (Last 3 Days)
Kp index data is currently unavailable.
NOAA Planetary K-Index Plot
The official interactive Kp index plot is available on the SWPC website: View NOAA Planetary K-Index
Aurora Forecast
Northern Hemisphere
Southern Hemisphere
Recent Geomagnetic Storms (30 Days)
NOAA Geomagnetic Storm Scale
The NOAA G-scale classifies geomagnetic storms from G1 (minor) to G5 (extreme) based on the Kp index. Below is a summary of each level and its potential effects.
No significant geomagnetic activity. Power systems and spacecraft operations are unaffected.
Weak power grid fluctuations. Minor impact on satellite operations. Aurora visible at high latitudes.
High-latitude power systems may experience voltage alarms. Spacecraft may need corrective actions.
Voltage corrections may be required. Surface charging on satellites. Intermittent satellite navigation issues.
Widespread voltage control problems. Satellite surface charging and tracking difficulties. Aurora visible at mid-latitudes.
Widespread power grid collapse possible. Extensive satellite damage. Aurora visible at low latitudes.