Fig. 5.From: Relevance of magnetic properties of soil in the magnetic observatories to geomagnetic observation(a) The annual variation in baseline values of the fluxgate magnetometer at the Memambetsu Observatory from January 2008 to June 2010. (b) Observed ground temperature at Memambetsu Observatory in 2004 (solid circles; Nishimura et al., 2012) and the determined annual variation in ground temperature (lines).Back to article page