Fig. 11From: Estimation of geomagnetically induced currents based on the measurement data of a transformer in a Japanese power network and geoelectric field observationsGeoelectric fields observed at the Memanbetsu Observatory of the October 29–30, 2003 storm and the estimated GIC using the 1-min geoelectric field data. The black lines and crosses show the 1-min data and the red lines and dots in the figure show the 1-s dataBack to article page