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Geomagnetically induced current
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<p>Geomagnetically induced currents (GIC) are <a href="/facts/Electrical_current/Dc1xdnUX">electrical currents</a> induced at the Earth's surface by rapid changes in the <a href="/facts/Geomagnetic_field/73G36wmx">geomagnetic field</a> caused by <a href="/facts/Space_weather/FfwUCv2G">space weather</a> events. GICs can affect the normal operation of long <a href="/facts/Electrical_conductor/BSuyupLP">electrical conductor</a> systems such as <a href="/facts/Electric_power_transmission/I9w3lRmM">electric transmission grids</a> and buried <a href="/facts/Pipeline_transport/gEmKcFhD">pipelines</a>. The geomagnetic disturbances which induce GICs include <a href="/facts/Geomagnetic_storm/4rD8DSlm">geomagnetic storms</a> and <a href="/facts/Substorm/bfgPJfVD">substorms</a> where the most severe disturbances occur at high <a href="/facts/Geomagnetic_latitude/ck0MyPMQ">geomagnetic latitudes</a>. </p>