NSFGEO-NERC: The history of the Earth's magnetic field strength over the last five million years: Filling in the southern hemisphere gap

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Despite significant progress, fundamental questions regarding the average field strength and its variation through time remain. We are particularly interested in the hypothesis that the magnetic field has a persistent hemispheric asymmetry, an idea supported by long-term (5 Myr) data compilations. We propose here a multi-pronged approach of determining the optimum experimental/analysis strategy combined with new sampling missions (targeting the Southern Hemisphere)in order to fill in gaps in the global database. We will also undertake a new data analysis of existing data sets to obtain the best possible picture of the ancient magnetic field over time.