J. J. Nervander, born 200 years ago, on 23 February 1805 (Figure 1), can be considered the founding father of Finnish geomagnetic research, as well as one of the early pioneers in the research of solar influence on the terrestrial weather and climate. Nervander, who studied physics and mathematics at the University of Turku (later at Helsinki), in Finland, was the first scientist in Finland who studied electromagnetism. At that time, it was a new scientific discipline, after the pioneering work by H. C. ¿rsted and others in the 1820s.