Fig. 3.From: Towards quantitative assessment of the hazard from space weather. Global 3-D modellings of the electric field induced by a realistic geomagnetic stormTime series of observed (black) and calculated (red) magnetic field at the observatories in Hermanus/South Africa (HER, left column) and Lanzhou/China (LZH, right column). The top row shows B φ , the bottom row B ϑ (both in nT).Back to article page