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Table 1 Historical hazardous RC-type GIC events

From: Extreme geomagnetically induced currents

Date −Dst (nT) dB/dt (nT/h) Note
2 September 1859 850a (900b) 600 Historically largest storm
15 May 1921 825–900b >400 Low-latitude aurorasc
13, 14 March 1989 589 130 Largest storm in the space age since 1957
29, 30 October 2003 353, 389 100 GIC hazardous superstorms
  1. aSiscoe et al. (2006)
  2. bCliver and Dietrich (2013)
  3. cSilverman and Cliver (2001)