Conservação e Digitalização do Registro Geomagnético Histórico do Observatório Magnético de Vassouras.

In this work, we present the first set of results provided by a joint effort of researchers and students of the National Observatory (ON/MCTIC), Institute of Astronomy, Geophysics and Atmospheric Sciences – University of São Paulo (IAG/USP), and Institute of Geosciences – State University of Campinas (IGc-UNICAMP), aiming to provide the cataloguing, digitization and online availability of historical geomagnetic and seismographic datasets which were carried out throughout the 20th century. Such geophysical repository is available, respectively, by historical collections of magnetograms from the Vassouras Magnetic Observatory (state of Rio de Janeiro, Brazil) and seismograms from the IAG/USP. Our goal is to provide high-resolution digital records of these data, which will enable access to records of the major 20th century quakes in Brazil, as well as to a ~ 100 yr record of the geomagnetic field for both the scientific community and the public in general.