Fig. 3.From: Relevance of magnetic properties of soil in the magnetic observatories to geomagnetic observationThe observation and sampling locations in (a) Memambetsu, (b) Kakioka and (c) Kanoya Observatories. Solid circles indicate the locations and sensor height of the main fluxgate magnetometers. Solid triangles show the absolute measurement houses. Open circles show the locations of the soil samples.Back to article page