Geomagnetic field observations in Amazon: implications for the new magnetic observatory

Magnetic observatories are important sources of continuous and precise geomagnetic data. Their spatial distribution around the globe is uneven, especially in ocean areas and South America. New magnetic observatories are being established in Brazil and the next one will be in Amazon. We installed a magnetic station to test data quality in the chosen location for the future observatory. In this work we analyse all magnetic data from Amazon that is available on the National Observatory: old measurements of repeat stations and the new station for the observatory placement. Some aspects about the installation, data quality and processing are discussed.