Modifies a noun

• storm: Power companies worldwide are becoming much more aware of the risk posed by geomagnetic storms.

• latitude: The optimum heading will vary depending on your geomagnetic latitude.

• equator: The contours so obtained showed a peak in n i at, or slightly South of, the geomagnetic equator.

• reversal: A belief in the comet storms led Donald Morris and Muller to a method of explaining some of the geomagnetic reversal.

• indices: This paper describes the first of a family of new geomagnetic indices aimed at meeting two requirements.

• disturbance: Instead, wave activity increases during geomagnetic disturbances driven by the Sun, suggesting that natural wave turbulence is responsible for the gap.