Geophysicae Results of the Helsinki magnetic observatory 1844 – 1912

Abstract

The geomagnetic field declination (D) and horizontal component (H)were observed visually at the Helsinki magnetic observatory between 1844–1912. About 2.0 million single observations of the magnetic components are available. The observing equipment and observation methods were the same for almost 70 years. The Helsinki data series is thus rather homogeneous… (More)

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