Articles | Volume 6, issue 2
Geosci. Instrum. Method. Data Syst., 6, 367–376, 2017

Special issue: The Earth’s magnetic field: measurements, data, and applications...

Geosci. Instrum. Method. Data Syst., 6, 367–376, 2017

Research article 10 Oct 2017

Research article | 10 Oct 2017

The magnetic observatory on Tatuoca, Belém, Brazil: history and recent developments

Achim Morschhauser1, Gabriel Brando Soares2, Jürgen Haseloff1, Oliver Bronkalla1, José Protásio2, Katia Pinheiro2, and Jürgen Matzka1 Achim Morschhauser et al.
  • 1GFZ German Research Centre for Geosciences, Geomagnetism, Telegrafenberg, 14473 Potsdam, Germany
  • 2Geophysics Department, Observatório Nacional, Rio de Janeiro, CEP, 20921-400, Brazil

Abstract. The Tatuoca magnetic observatory (IAGA code: TTB) is located on a small island in the Amazonian delta in the state of Pará, Brazil. Its location close to the geomagnetic equator and within the South Atlantic Anomaly offers a high scientific return of the observatory's data. A joint effort by the National Observatory of Brazil (ON) and the GFZ German Research Centre for Geosciences (GFZ) was undertaken, starting from 2015 in order to modernise the observatory with the goal of joining the INTERMAGNET network and to provide real-time data access. In this paper, we will describe the history of the observatory, recent improvements, and plans for the near future. In addition, we will give some comments on absolute observations of the geomagnetic field near the geomagnetic equator.

Short summary
We report on the history and recent developments of the Tatuoca magnetic observatory in Brazil. This observatory is located close to the geomagnetic equator and within a region of strong main field dynamics. Starting from 2015, we have installed new instrumentation and a new datalogger system. In the paper, we also comment on the challenges of doing absolute measurements at the geomagnetic equator.