摘要：Geomagnetically induced currents (GICs) have been the bane of technology-dependent societies. In telegraph lines, submarine cables, railroads, and electrical power grids, nature has found a way to insert its highly variable self, via GICs, into the workings of modern systems often with little advance warning. In this special collection we have surveyed Earth current and GIC-related manuscripts from all American Geophysical Union (AGU) journals in the last 55years to highlight what is known about interactions between GICs and technological systems and the present gaps in understanding of GICs as an electromagnetic hazard.
