Earth, Planets and Space

Table 4 Estimated amplitudes of 100-year and 1000-year events

From: Extreme geomagnetic activities: a statistical study

	Storm	SC	Substorm
100-year event	750* ~ 1100 nT	160 ~ 230* nT	5000* ~ 6000 nT
1000-year event	1100* ~ 2200 nT	240 ~ 450* nT	6200* ~ 8500 nT

Asterisks denote the probable values from the better fitted distributions

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