| As the magnetic storm raged through the night, huge geomagnetically induced currents surged through the wires and cables. |
| They also monitor the severity of space weather activity and the magnitudes of geomagnetically induced currents to increase their preparedness and to take additional protective actions. |
| Large power transformers at substations, which are grounded to the Earth, would be affected by geomagnetically induced current as a result of such a storm and fail. |
| The geomagnetically induced currents flow through the transformer windings at transformer substations, producing extra magnetization that can saturate the core of the transformer. |
| That said, an E3 pulse lasting a minute or so can produce geomagnetically induced currents in long conductors such as power cables. |
| These geomagnetically induced currents are especially large during disturbed space weather conditions and reduce the quality of transmitted signals. |
