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E3C08
Which of the following is the space-weather term for an extreme geomagnetic storm?
Pick an answer to check it.
Answer: D. G5
NOAA rates geomagnetic storms from G1 (minor) to G5 (extreme). X5 and M9 are solar flare classes, not geomagnetic storm levels.
Tip: G scale for geomagnetic: G5 is extreme.