From Glossary of Meteorology


  1. (Also called terrestrial magnetism, geomagnetic field.) The earth's magnetic field or the geophysical phenomena caused or affected by this field.

  2. The scientific study of the earth's magnetic field, including its variation in space and time, and its relation to other geophysical phenomena (e.g., aurora).

    Geomagnetism belongs to the same family of earth sciences as geodesy and geomorphology.