The application provides the current value of the Kp-index derived at the NOAA Space Weather Prediction Center using data from ground-based magnetometers.
What is Kp-index - The K-index quantifies disturbances in the horizontal component of earths magnetic field with an integer in the range 0-9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval.
The official planetary Kp index is derived by calculating a weighted average of K-indices from a network of geomagnetic observatories.
Kp of 0 to 4 is below storm, which is G0.
Kp-index NOAA Space Weather
Scale Geomagnetic Storm Level
Kp=5 G1
Kp=6 G2
Kp=7 G3
Kp=8 G4
Kp=9 G5