G0093700 (jē′ō-măg′nĭ-tĭz′əm)n.1. The magnetism of the earth.2. The study of the earth's magnetism.ge′o·mag·net′ic(-nĕt′ĭk) adj.ge′o·mag·net′i·cal·ly adv.
geomagnetically
(ˌdʒiːəʊmæɡˈnɛtɪklɪ) adv (General Physics) from a geomagnetic point of viewEncyclopediaSeegeomagnetism