The Geomagnetic Core Field
The dominant component is the so-called main field, generated by a hydrodynamic dynamo operating in the Earth's fluid core.
The Magnetic Field of the Lithosphere
The second internal contribution of the Earth's magnetic field comes from the Earth's lithosphere, induced from magnetised rocks.
External Magnetic Fields
The third contribution, often varying rapidly in time, comes from outside the Earth, from current systems in the ionosphere and magnetosphere, driven by the activity of the Sun.
Oceanic magnetic fields
Amongst the many sources which contribute to the geomagnetic field the magnetic field generation due to ocean circulation is the most faintest.
Geomagnetic Field Models
Models describing the global geomagnetic field, which were developed in our group and in cooperations, with software or grid values for application. The different models include the core field and its current and long-term secular variation and the lithospheric field.