Figure 5From: The characteristics of geoelectric fields at Kakioka, Kanoya, and Memambetsu inferred from voltage measurements during 2000 to 2011Comparison of the coherences during a disturbed time and a slightly disturbed time at Kakioka. The coherences of the geoelectric and geomagnetic fields during a magnetic storm (circles) and during a slightly disturbed time (squares) for Kakioka are shown. Dotted lines show the errors in coherence.Back to article page