single phase vs. three phas...Figure 9.19 BPA 230 kV transformer demographics: single phase vs. three phas...Figure 9.20 Normal excitation current in 500 kV transformer.Figure 9.21 Distorted excitation current with 5 Amps/phase of GIC.Figure 9.22 Distorted excitation current with 25 Amps/phase of GIC.Figure 9.23 Distorted excitation current with 100 Amps/phase of GIC.Figure 9.24 Transformer total load current: normal conditions (blue) and wit...Figure 9.25 Pattern of geoelectric field and GIC flows in New England region...Figure 9.26 Peak dB/dt observed by region on 13–14 March 1989.Figure 9.27 GIC and geoelectric field conditions: 7:45 UT, 13 March 1989.Figure 9.28 Simulation of geomagnetic conditions at 11:26 UT on 13 March 198...Figure 9.29 Reported North American power system impacts, 13 March 1989 for ...Figure 9.30 Reported North American power system impacts, 13 March 1989 for ...Figure 9.31 Simulated 21:50 UT, 13 March 1989, conditions.Figure 9.32 Simulated 22:00 UT, 13 March 1989, conditions. The intense geoma...Figure 9.33 Simulation of US power grid conditions at 21:44 UT on 13 March 1...Figure 9.34 Simulation of US power grid conditions at 21:51 UT on 13 March 1...Figure 9.35 Simulation of US power grid conditions at 21:57 UT on 13 March 1...Figure 9.36 Simulation of US power grid conditions at 22:09 UT on 13 March 1...Figure 9.37 Reported North American power system impacts, 13–14 March 1989 f...Figure 9.38 Simulated 01:20 UT, 14 March 1989, conditions.Figure 9.39 World map of measurement sites considered for the evaluation of ...Figure 9.40 Comparison of the measured SI event on 18 March 2002 at 13:23 UT...Figure 9.41 Locations of the four magnetometer sites for electrojet comparis...Figure 9.42 Horizontal B fields at four sites for 29 October 2003.Figure 9.43 Tromso horizontal B‐fields for 4‐month period in 1994.
