Solar Quiet (Sq) Field Model

The Sq Model is an attempt at a near-comprehensive spatial and temporal representation of Earth's complex magnetic field system. It considers sources in the core, crust, ionosphere, and magnetosphere. It also accounts for induced fields in the region sampled by the Magsat satellite. The model includes time variations on three distinct scales: secular variation of the core field from the beginning of the POGO satellite mission (1965) to the end of the Magsat mission (1980); and the daily and seasonal variations in the ionospheric and magnetospheric fields.

Ionospheric Current Animations

• March 21
• June 21
• December 21

Observatory Plots

• Alibag, India
• Alert, Greenland
• Port-Aux-Francais, Antarctic
• Tucson, United States

Toroidal Field Plots

• Dawn
• Dusk

For more information on modeling the Earth's external magnetic field see the article:

Langel, R.A., T.J. Sabaka, R.T. Baldwin, and J.A. Conrad, The near-Earth magnetic field from magnetospheric and quiet-day ionospheric sources and how it is modeled, Phys. Earth Planet. Int., 98, 235-267, 1996.

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