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Last Updated: 05/26/2022


Version: 2012-03-05

The statistical model calculates magnetic perturbations on the ground (north, east and down components) (and the change of horizontal components dB/dt=sqrt( [d(DeltaB_north)/dt]^2 + [d(DeltaB_East)/dt]^2 ) ) at the location of selected magnetometer stations. The model uses solar wind data from ACE or WIND.


The model comes in two flavors, one returning the DeltaB values the other change rate of the horizontal component (in nT/s).


Input parameters include the solar wind plasma number density N, velocity V_x (along Sun-Earth line), the transverse orientation of the solar wind magnetic field B_y, B_z (in GSM coordinates), and the orientation of the Earth's magnetic axis at the time of interest. These parameters are used to set up the model for the desired conditions, after which the only needed input parameters are the geomagnetic latitude and magnetic local time (MLT), in AACGM (Altitude Adjusted Corrected Geomagnetic) coordinates.


The output from the model consists of the magnetic perturbations, in nT, at a selected set of magnetometer locations on the ground. Magnetic perturbations as returned by the model are the differences on a 1-minute time scale from the background magnetic field of the Earth.

Model is time-dependant.


  • High Latitude Ionosphere / Auroral Region

Space Weather Impacts

  • Geomagnetically induced currents - GICs (electric power systems)


Code Languages: Matlab/Octave


Publication Policy

In addition to any model-specific policy, please refer to the General Publication Policy.