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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.


(General Physics) from a geomagnetic point of view
References in periodicals archive ?
The most common ones are the widespread use of the grid-connected static power converters [2], [3], the influence of the high-voltage DC transmission [4] and the geomagnetically induced current (GIC) [5], [6].
Researchers studied 14 years of global ionospheric data and discovered that the EEJ strengthens geomagnetically induced currents.
Low-Frequency Protection Concepts for the Electric Power Grid: Geomagnetically Induced Current (GIC) and E3 HEMP Mitigation," Meta-R-322, Metatech, January 2010.
Because it takes about 1 h for the solar wind to travel from the Lagrange L1 point to the magnetospheric nose, such monitoring can give about 1 h of warning time for preparing to the radiation belt enhancement, geomagnetically induced current, and other possible adverse effects of magnetic storms.
In addition, these geomagnetically induced currents or GIC hot zones are also affecting pipelines and even power lines by creating interference with the flow of electricity at the surface, and possibly the migration of gas or oil or water in the subsurface across geologic time.
Geomagnetically he is closer to the auroral zone than the United Kingdom and is much better placed to ob serve this phenomenon.
Dr Pierre Cilliers participated in an Antarctic expedition in December 2007 and an expedition to Marion Island in April 2010 to promote international research on Space Weather and is currently the SANSA PI for a project on Geomagnetically induced currents.
For example, they can temporarily divert power flow from the most severely affected parts of the grid to protect the entire grid against geomagnetically induced currents.