Figure 1From: Reproducing electric field observations during magnetic storms by means of rigorous 3-D modelling and distortion matrix co-estimationE-field measurement sites. The three Japanese observatories provide electric field data continuously, whereas the ocean bottom array was installed during the April 2000 magnetic storm. Note that OB3, which was installed on the seafloor between OB2 and OB4, did not provide useful data. Colours indicate topography/bathymetry.Back to article page