抄録
For about 25 years, measurements of the magnetic components have been carried out at repeat stations in the territory of the GDR. All measurements at common stations of the magnetic surveys for the epochs 1901, 1935, and 1957 were compared. The results of the investigation indicate secular variation anomalies with amplitudes of about 3-4nT/year. These anomalies are obviously partly located in regions with marked recent vertical and horizontal movements. Moreover they seem to be characterized by positive anomalies of the heat flow.
