通过对地磁活动性的统计分析，估计加拿大魁北克电网可能经受的最大GIC达每相78A（一年一次）和234A（每十年一次）。
It is assesed that the possible maximum 1-year ( and 10-year ) GIC values are 78 ( 234 ) A / phase on the Hydro-Queb é c power system according to the statistical analysis of geomagnetic activity .
地磁活动性